Added the prototype library in order to build classes, and done some refactorings.

5 files changed, 7157 insertions, 90 deletions

diff --git a/js/activity.js b/js/activity.js
index 983b724..4a1702a 100644
--- a/js/activity.js
+++ b/js/activity.js
@@ -6,8 +6,13 @@ define(function (require) {
         Tween = require('tween'),
         Preload = require('preload'),
         $ = require('jquery'),
-        minDimisHeight,
-        lessonText;
+        prototype = require('prototype'),
+        GraphicalBoard = require('graphical_board'),
+        TextZone = require('textzone');
+    
+    var graphicalBoard,
+        textZone,
+        minDimisHeight;
 
     // Manipulate the DOM only when it is ready.
     require(['domReady!'], function (doc) {
@@ -42,6 +47,13 @@ define(function (require) {
         var gap = (minDim - 2*boardOffset) * 0.03;
         var cellDim = boardDim/8;
         var picturesSizeRatio = cellDim/1000.0;
+        graphicalBoard = new GraphicalBoard([boardOffset, boardOffset], cellDim, stage);
+        if (minDimisHeight) {
+            textZone = new TextZone(boardOffset, boardOffset + cellDim * 8 + gap, 8 * cellDim, textZoneMinDim, 20 * cellDim / 50,  "#2211CC", "#FFF", stage);
+        }
+        else {
+            textZone = new TextZone(boardOffset + cellDim * 8 + gap, boardOffset, textZoneMinDim, 8 * cellDim, 20 * cellDim / 50,  "#2211CC", "#FFF", stage);
+        }
         
         // Load images asynchronously
         var piecesImages = {};
@@ -72,104 +84,25 @@ define(function (require) {
         
         function handleLoadingComplete(){
             
-            drawEmptyBoard();
-            drawTextZone();
+            graphicalBoard.addToStage();
+            textZone.addToStage();
             
-            var text = "Here the white bishop can eat the black "
-            + "queen, because the black queen is on the bishop diagonal !";
-            lessonText = new createjs.Text(text, getFontText(), "#FFF");
-            if (minDimisHeight) {
-                lessonText.lineWidth = 8*cellDim;
-            }
-            else {
-                lessonText.lineWidth = textZoneMinDim;
-            }
-            var lessonTextPos = getTextZonePos();
-            lessonText.x = lessonTextPos[0];
-            lessonText.y = lessonTextPos[1];
-            stage.addChild(lessonText);
+            textZone.changeTextTo("Here the white bishop can eat the black "+
+                                  "queen, because the black queen is on the bishop diagonal !");
             
             var img1 = piecesImages.wb.clone();
-            var img1Pos = getCellPos(2,3);
-            img1.x = img1Pos[0];
-            img1.y = img1Pos[1];
+            img1.x = graphicalBoard.getFileX(2);
+            img1.y = graphicalBoard.getRankY(3);
             stage.addChild(img1);
             
             var img2 = piecesImages.bq.clone();
-            var img2Pos = getCellPos(6,7);
-            img2.x = img2Pos[0];
-            img2.y = img2Pos[1];
+            img2.x = graphicalBoard.getFileX(6);
+            img2.y = graphicalBoard.getRankY(7);
             stage.addChild(img2);
             
             stage.update();
         }
         
-        /*
-        Parameters : file then rank (0 to 7).
-        Return value : (file_pos, rank_pos)
-        */
-        function getCellPos(file, rank){
-            return [
-                boardOffset + cellDim * file,
-                boardOffset + cellDim * (7 - rank)
-            ];
-        }
-        
-        function drawEmptyBoard(){
-            for (var rank = 0; rank < 8; rank++){
-                for (var file = 0; file < 8; file++){
-                    var color;
-                    if ((rank+file) % 2 !== 0) color = "#FFDB58";
-                    else color = "#6F4E37";
-                    
-                    var pos = getCellPos(file, rank);
-                    
-                    var rectangle = new createjs.Shape();
-                    rectangle.graphics.beginFill(color).drawRect(
-                        pos[0], pos[1], cellDim, cellDim
-                    );
-                    
-                    stage.addChild(rectangle);
-                }
-            }
-            stage.update();
-        }
-        
-        function getFontText()
-        {
-            var fontSize = 20 * cellDim / 50;
-            var fontValue = fontSize + "px Arial";
-            return fontValue;
-        }
-        
-        function getTextZonePos(){
-            if (minDimisHeight) {
-                return [boardOffset,
-                      boardOffset + cellDim * 8 + gap];
-            }
-            else {
-                return [boardOffset + cellDim * 8 + gap,
-                        boardOffset];
-            }
-        }
-        
-        function drawTextZone(){
-            var txtZone = new createjs.Shape();
-            var pos = getTextZonePos();
-            if (minDimisHeight) {
-                txtZone.graphics.beginFill("#2211CC").drawRect(
-                    pos[0], pos[1], 8 * cellDim, textZoneMinDim
-                );
-            }
-            else {
-                txtZone.graphics.beginFill("#2211CC").drawRect(
-                    pos[0], pos[1], textZoneMinDim, 8 * cellDim
-                );
-            }
-            stage.addChild(txtZone);
-            stage.update();
-        }
-
     });
 
 });
diff --git a/js/loader.js b/js/loader.js
index 7a4a434..a3799c4 100644
--- a/js/loader.js
+++ b/js/loader.js
@@ -13,6 +13,18 @@ requirejs.config({
         },
         jquery: {
             exports: 'jquery'
+        },
+        prototype : {
+            exports: 'prototype'
+        },
+        // Custom libraries
+        graphical_board : {
+            deps: ['easel', 'prototype'],
+            exports: 'GraphicalBoard'
+        },
+        textzone : {
+            deps: ['easel', 'prototype'],
+            exports: 'TextZone'
         }
     },
     paths: {
@@ -20,7 +32,10 @@ requirejs.config({
         easel: 'easeljs',
         tween: 'tweenjs',
         preload: 'preloadjs',
-        jquery: 'jquery'
+        jquery: 'jquery',
+        prototype: 'prototype',
+        graphical_board: 'customs/graphical_board',
+        textzone: 'customs/textzone'
     }
 });
 
diff --git a/lib/customs/graphical_board.js b/lib/customs/graphical_board.js
new file mode 100644
index 0000000..57df226
--- /dev/null
+++ b/lib/customs/graphical_board.js
@@ -0,0 +1,46 @@
+var GraphicalBoard = Class.create();
+GraphicalBoard.prototype = {
+    // pos : a literal array of two integers => e.g [3,10]
+    // cellSize : an integer
+    // stage : createjs stage
+    initialize: function(pos, cellSize, stage){
+        this.pos = pos;
+        this.cellSize = cellSize;
+        this.stage = stage;
+    },
+    getX: function(){
+        return this.pos[0];
+    },
+    getY: function(){
+        return this.pos[1];
+    },
+    getCellSize: function(){
+        return this.cellSize;
+    },
+    // file : (0..7)
+    getFileX: function(file){
+        return this.pos[0] + file * this.cellSize; 
+    },
+    // rank :  (0..7)
+    getRankY: function(rank){
+        return this.pos[1] + (7-rank) * this.cellSize; 
+    },
+    addToStage: function(){
+        for (var rank = 0; rank < 8; rank++){
+            for (var file = 0; file < 8; file++){
+                var color;
+                if ((rank+file) % 2 !== 0) color = "#FFDB58";
+                else color = "#6F4E37";
+
+                var rectangle = new createjs.Shape();
+                rectangle.graphics.beginFill(color).drawRect(
+                    this.getFileX(file), this.getRankY(rank), this.cellSize, this.cellSize
+                );
+
+                this.stage.addChild(rectangle);
+            }
+        }
+        this.stage.update();
+    }
+
+};
\ No newline at end of file
diff --git a/lib/customs/textzone.js b/lib/customs/textzone.js
new file mode 100644
index 0000000..386cd47
--- /dev/null
+++ b/lib/customs/textzone.js
@@ -0,0 +1,37 @@
+var TextZone = Class.create();
+TextZone.prototype = {
+    initialize: function(x, y, width, height, fontSize, backgroundColor, textColor, stage){
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        this.height = height;
+        this.fontSize = fontSize;
+        this.backgroundColor = backgroundColor;
+        this.textColor = textColor;
+        this.stage = stage;
+
+        this.fontStr = this.fontSize + "px Arial";
+        this.text = new createjs.Text("", this.fontStr, this.textColor);
+        this.stage.addChild(this.text);
+        this.stage.update();
+    },
+    addToStage: function(){
+        var txtZone = new createjs.Shape();
+        txtZone.graphics.beginFill(this.backgroundColor).drawRect(
+            this.x, this.y, this.width, this.height
+        );
+        this.stage.addChild(txtZone);
+        this.stage.update();
+    },
+    changeTextTo: function(newText){
+        this.stage.removeChild(this.text);
+
+        this.text = new createjs.Text(newText, this.fontStr, this.textColor);
+        this.text.lineWidth = this.width;
+        this.text.x = this.x;
+        this.text.y = this.y;
+
+        this.stage.addChild(this.text);
+        this.stage.update();
+    }
+};
\ No newline at end of file
diff --git a/lib/prototype.js b/lib/prototype.js
new file mode 100644
index 0000000..37dd39a
--- /dev/null
+++ b/lib/prototype.js
@@ -0,0 +1,7036 @@
+/*  Prototype JavaScript framework, version 1.7.1
+ *  (c) 2005-2010 Sam Stephenson
+ *
+ *  Prototype is freely distributable under the terms of an MIT-style license.
+ *  For details, see the Prototype web site: http://www.prototypejs.org/
+ *
+ *--------------------------------------------------------------------------*/
+
+var Prototype = {
+
+  Version: '1.7.1',
+
+  Browser: (function(){
+    var ua = navigator.userAgent;
+    var isOpera = Object.prototype.toString.call(window.opera) == '[object Opera]';
+    return {
+      IE:             !!window.attachEvent && !isOpera,
+      Opera:          isOpera,
+      WebKit:         ua.indexOf('AppleWebKit/') > -1,
+      Gecko:          ua.indexOf('Gecko') > -1 && ua.indexOf('KHTML') === -1,
+      MobileSafari:   /Apple.*Mobile/.test(ua)
+    }
+  })(),
+
+  BrowserFeatures: {
+    XPath: !!document.evaluate,
+
+    SelectorsAPI: !!document.querySelector,
+
+    ElementExtensions: (function() {
+      var constructor = window.Element || window.HTMLElement;
+      return !!(constructor && constructor.prototype);
+    })(),
+    SpecificElementExtensions: (function() {
+      if (typeof window.HTMLDivElement !== 'undefined')
+        return true;
+
+      var div = document.createElement('div'),
+          form = document.createElement('form'),
+          isSupported = false;
+
+      if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) {
+        isSupported = true;
+      }
+
+      div = form = null;
+
+      return isSupported;
+    })()
+  },
+
+  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script\\s*>',
+  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,
+
+  emptyFunction: function() { },
+
+  K: function(x) { return x }
+};
+
+if (Prototype.Browser.MobileSafari)
+  Prototype.BrowserFeatures.SpecificElementExtensions = false;
+/* Based on Alex Arnell's inheritance implementation. */
+
+var Class = (function() {
+
+  var IS_DONTENUM_BUGGY = (function(){
+    for (var p in { toString: 1 }) {
+      if (p === 'toString') return false;
+    }
+    return true;
+  })();
+
+  function subclass() {};
+  function create() {
+    var parent = null, properties = $A(arguments);
+    if (Object.isFunction(properties[0]))
+      parent = properties.shift();
+
+    function klass() {
+      this.initialize.apply(this, arguments);
+    }
+
+    Object.extend(klass, Class.Methods);
+    klass.superclass = parent;
+    klass.subclasses = [];
+
+    if (parent) {
+      subclass.prototype = parent.prototype;
+      klass.prototype = new subclass;
+      parent.subclasses.push(klass);
+    }
+
+    for (var i = 0, length = properties.length; i < length; i++)
+      klass.addMethods(properties[i]);
+
+    if (!klass.prototype.initialize)
+      klass.prototype.initialize = Prototype.emptyFunction;
+
+    klass.prototype.constructor = klass;
+    return klass;
+  }
+
+  function addMethods(source) {
+    var ancestor   = this.superclass && this.superclass.prototype,
+        properties = Object.keys(source);
+
+    if (IS_DONTENUM_BUGGY) {
+      if (source.toString != Object.prototype.toString)
+        properties.push("toString");
+      if (source.valueOf != Object.prototype.valueOf)
+        properties.push("valueOf");
+    }
+
+    for (var i = 0, length = properties.length; i < length; i++) {
+      var property = properties[i], value = source[property];
+      if (ancestor && Object.isFunction(value) &&
+          value.argumentNames()[0] == "$super") {
+        var method = value;
+        value = (function(m) {
+          return function() { return ancestor[m].apply(this, arguments); };
+        })(property).wrap(method);
+
+        value.valueOf = (function(method) {
+          return function() { return method.valueOf.call(method); };
+        })(method);
+
+        value.toString = (function(method) {
+          return function() { return method.toString.call(method); };
+        })(method);
+      }
+      this.prototype[property] = value;
+    }
+
+    return this;
+  }
+
+  return {
+    create: create,
+    Methods: {
+      addMethods: addMethods
+    }
+  };
+})();
+(function() {
+
+  var _toString = Object.prototype.toString,
+      _hasOwnProperty = Object.prototype.hasOwnProperty,
+      NULL_TYPE = 'Null',
+      UNDEFINED_TYPE = 'Undefined',
+      BOOLEAN_TYPE = 'Boolean',
+      NUMBER_TYPE = 'Number',
+      STRING_TYPE = 'String',
+      OBJECT_TYPE = 'Object',
+      FUNCTION_CLASS = '[object Function]',
+      BOOLEAN_CLASS = '[object Boolean]',
+      NUMBER_CLASS = '[object Number]',
+      STRING_CLASS = '[object String]',
+      ARRAY_CLASS = '[object Array]',
+      DATE_CLASS = '[object Date]',
+      NATIVE_JSON_STRINGIFY_SUPPORT = window.JSON &&
+        typeof JSON.stringify === 'function' &&
+        JSON.stringify(0) === '0' &&
+        typeof JSON.stringify(Prototype.K) === 'undefined';
+
+
+
+  var DONT_ENUMS = ['toString', 'toLocaleString', 'valueOf',
+   'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'constructor'];
+
+  var IS_DONTENUM_BUGGY = (function(){
+    for (var p in { toString: 1 }) {
+      if (p === 'toString') return false;
+    }
+    return true;
+  })();
+
+  function Type(o) {
+    switch(o) {
+      case null: return NULL_TYPE;
+      case (void 0): return UNDEFINED_TYPE;
+    }
+    var type = typeof o;
+    switch(type) {
+      case 'boolean': return BOOLEAN_TYPE;
+      case 'number':  return NUMBER_TYPE;
+      case 'string':  return STRING_TYPE;
+    }
+    return OBJECT_TYPE;
+  }
+
+  function extend(destination, source) {
+    for (var property in source)
+      destination[property] = source[property];
+    return destination;
+  }
+
+  function inspect(object) {
+    try {
+      if (isUndefined(object)) return 'undefined';
+      if (object === null) return 'null';
+      return object.inspect ? object.inspect() : String(object);
+    } catch (e) {
+      if (e instanceof RangeError) return '...';
+      throw e;
+    }
+  }
+
+  function toJSON(value) {
+    return Str('', { '': value }, []);
+  }
+
+  function Str(key, holder, stack) {
+    var value = holder[key];
+    if (Type(value) === OBJECT_TYPE && typeof value.toJSON === 'function') {
+      value = value.toJSON(key);
+    }
+
+    var _class = _toString.call(value);
+
+    switch (_class) {
+      case NUMBER_CLASS:
+      case BOOLEAN_CLASS:
+      case STRING_CLASS:
+        value = value.valueOf();
+    }
+
+    switch (value) {
+      case null: return 'null';
+      case true: return 'true';
+      case false: return 'false';
+    }
+
+    var type = typeof value;
+    switch (type) {
+      case 'string':
+        return value.inspect(true);
+      case 'number':
+        return isFinite(value) ? String(value) : 'null';
+      case 'object':
+
+        for (var i = 0, length = stack.length; i < length; i++) {
+          if (stack[i] === value) {
+            throw new TypeError("Cyclic reference to '" + value + "' in object");
+          }
+        }
+        stack.push(value);
+
+        var partial = [];
+        if (_class === ARRAY_CLASS) {
+          for (var i = 0, length = value.length; i < length; i++) {
+            var str = Str(i, value, stack);
+            partial.push(typeof str === 'undefined' ? 'null' : str);
+          }
+          partial = '[' + partial.join(',') + ']';
+        } else {
+          var keys = Object.keys(value);
+          for (var i = 0, length = keys.length; i < length; i++) {
+            var key = keys[i], str = Str(key, value, stack);
+            if (typeof str !== "undefined") {
+               partial.push(key.inspect(true)+ ':' + str);
+             }
+          }
+          partial = '{' + partial.join(',') + '}';
+        }
+        stack.pop();
+        return partial;
+    }
+  }
+
+  function stringify(object) {
+    return JSON.stringify(object);
+  }
+
+  function toQueryString(object) {
+    return $H(object).toQueryString();
+  }
+
+  function toHTML(object) {
+    return object && object.toHTML ? object.toHTML() : String.interpret(object);
+  }
+
+  function keys(object) {
+    if (Type(object) !== OBJECT_TYPE) { throw new TypeError(); }
+    var results = [];
+    for (var property in object) {
+      if (_hasOwnProperty.call(object, property))
+        results.push(property);
+    }
+
+    if (IS_DONTENUM_BUGGY) {
+      for (var i = 0; property = DONT_ENUMS[i]; i++) {
+        if (_hasOwnProperty.call(object, property))
+          results.push(property);
+      }
+    }
+
+    return results;
+  }
+
+  function values(object) {
+    var results = [];
+    for (var property in object)
+      results.push(object[property]);
+    return results;
+  }
+
+  function clone(object) {
+    return extend({ }, object);
+  }
+
+  function isElement(object) {
+    return !!(object && object.nodeType == 1);
+  }
+
+  function isArray(object) {
+    return _toString.call(object) === ARRAY_CLASS;
+  }
+
+  var hasNativeIsArray = (typeof Array.isArray == 'function')
+    && Array.isArray([]) && !Array.isArray({});
+
+  if (hasNativeIsArray) {
+    isArray = Array.isArray;
+  }
+
+  function isHash(object) {
+    return object instanceof Hash;
+  }
+
+  function isFunction(object) {
+    return _toString.call(object) === FUNCTION_CLASS;
+  }
+
+  function isString(object) {
+    return _toString.call(object) === STRING_CLASS;
+  }
+
+  function isNumber(object) {
+    return _toString.call(object) === NUMBER_CLASS;
+  }
+
+  function isDate(object) {
+    return _toString.call(object) === DATE_CLASS;
+  }
+
+  function isUndefined(object) {
+    return typeof object === "undefined";
+  }
+
+  extend(Object, {
+    extend:        extend,
+    inspect:       inspect,
+    toJSON:        NATIVE_JSON_STRINGIFY_SUPPORT ? stringify : toJSON,
+    toQueryString: toQueryString,
+    toHTML:        toHTML,
+    keys:          Object.keys || keys,
+    values:        values,
+    clone:         clone,
+    isElement:     isElement,
+    isArray:       isArray,
+    isHash:        isHash,
+    isFunction:    isFunction,
+    isString:      isString,
+    isNumber:      isNumber,
+    isDate:        isDate,
+    isUndefined:   isUndefined
+  });
+})();
+Object.extend(Function.prototype, (function() {
+  var slice = Array.prototype.slice;
+
+  function update(array, args) {
+    var arrayLength = array.length, length = args.length;
+    while (length--) array[arrayLength + length] = args[length];
+    return array;
+  }
+
+  function merge(array, args) {
+    array = slice.call(array, 0);
+    return update(array, args);
+  }
+
+  function argumentNames() {
+    var names = this.toString().match(/^[\s\(]*function[^(]*\(([^)]*)\)/)[1]
+      .replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '')
+      .replace(/\s+/g, '').split(',');
+    return names.length == 1 && !names[0] ? [] : names;
+  }
+
+
+  function bind(context) {
+    if (arguments.length < 2 && Object.isUndefined(arguments[0]))
+      return this;
+
+    if (!Object.isFunction(this))
+      throw new TypeError("The object is not callable.");
+
+    var nop = function() {};
+    var __method = this, args = slice.call(arguments, 1);
+
+    var bound = function() {
+      var a = merge(args, arguments), c = context;
+      var c = this instanceof bound ? this : context;
+      return __method.apply(c, a);
+    };
+
+    nop.prototype   = this.prototype;
+    bound.prototype = new nop();
+
+    return bound;
+  }
+
+  function bindAsEventListener(context) {
+    var __method = this, args = slice.call(arguments, 1);
+    return function(event) {
+      var a = update([event || window.event], args);
+      return __method.apply(context, a);
+    }
+  }
+
+  function curry() {
+    if (!arguments.length) return this;
+    var __method = this, args = slice.call(arguments, 0);
+    return function() {
+      var a = merge(args, arguments);
+      return __method.apply(this, a);
+    }
+  }
+
+  function delay(timeout) {
+    var __method = this, args = slice.call(arguments, 1);
+    timeout = timeout * 1000;
+    return window.setTimeout(function() {
+      return __method.apply(__method, args);
+    }, timeout);
+  }
+
+  function defer() {
+    var args = update([0.01], arguments);
+    return this.delay.apply(this, args);
+  }
+
+  function wrap(wrapper) {
+    var __method = this;
+    return function() {
+      var a = update([__method.bind(this)], arguments);
+      return wrapper.apply(this, a);
+    }
+  }
+
+  function methodize() {
+    if (this._methodized) return this._methodized;
+    var __method = this;
+    return this._methodized = function() {
+      var a = update([this], arguments);
+      return __method.apply(null, a);
+    };
+  }
+
+  var extensions = {
+    argumentNames:       argumentNames,
+    bindAsEventListener: bindAsEventListener,
+    curry:               curry,
+    delay:               delay,
+    defer:               defer,
+    wrap:                wrap,
+    methodize:           methodize
+  };
+
+  if (!Function.prototype.bind)
+    extensions.bind = bind;
+
+  return extensions;
+})());
+
+
+
+(function(proto) {
+
+
+  function toISOString() {
+    return this.getUTCFullYear() + '-' +
+      (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
+      this.getUTCDate().toPaddedString(2) + 'T' +
+      this.getUTCHours().toPaddedString(2) + ':' +
+      this.getUTCMinutes().toPaddedString(2) + ':' +
+      this.getUTCSeconds().toPaddedString(2) + 'Z';
+  }
+
+
+  function toJSON() {
+    return this.toISOString();
+  }
+
+  if (!proto.toISOString) proto.toISOString = toISOString;
+  if (!proto.toJSON) proto.toJSON = toJSON;
+
+})(Date.prototype);
+
+
+RegExp.prototype.match = RegExp.prototype.test;
+
+RegExp.escape = function(str) {
+  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
+};
+var PeriodicalExecuter = Class.create({
+  initialize: function(callback, frequency) {
+    this.callback = callback;
+    this.frequency = frequency;
+    this.currentlyExecuting = false;
+
+    this.registerCallback();
+  },
+
+  registerCallback: function() {
+    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
+  },
+
+  execute: function() {
+    this.callback(this);
+  },
+
+  stop: function() {
+    if (!this.timer) return;
+    clearInterval(this.timer);
+    this.timer = null;
+  },
+
+  onTimerEvent: function() {
+    if (!this.currentlyExecuting) {
+      try {
+        this.currentlyExecuting = true;
+        this.execute();
+        this.currentlyExecuting = false;
+      } catch(e) {
+        this.currentlyExecuting = false;
+        throw e;
+      }
+    }
+  }
+});
+Object.extend(String, {
+  interpret: function(value) {
+    return value == null ? '' : String(value);
+  },
+  specialChar: {
+    '\b': '\\b',
+    '\t': '\\t',
+    '\n': '\\n',
+    '\f': '\\f',
+    '\r': '\\r',
+    '\\': '\\\\'
+  }
+});
+
+Object.extend(String.prototype, (function() {
+  var NATIVE_JSON_PARSE_SUPPORT = window.JSON &&
+    typeof JSON.parse === 'function' &&
+    JSON.parse('{"test": true}').test;
+
+  function prepareReplacement(replacement) {
+    if (Object.isFunction(replacement)) return replacement;
+    var template = new Template(replacement);
+    return function(match) { return template.evaluate(match) };
+  }
+
+  function gsub(pattern, replacement) {
+    var result = '', source = this, match;
+    replacement = prepareReplacement(replacement);
+
+    if (Object.isString(pattern))
+      pattern = RegExp.escape(pattern);
+
+    if (!(pattern.length || pattern.source)) {
+      replacement = replacement('');
+      return replacement + source.split('').join(replacement) + replacement;
+    }
+
+    while (source.length > 0) {
+      if (match = source.match(pattern)) {
+        result += source.slice(0, match.index);
+        result += String.interpret(replacement(match));
+        source  = source.slice(match.index + match[0].length);
+      } else {
+        result += source, source = '';
+      }
+    }
+    return result;
+  }
+
+  function sub(pattern, replacement, count) {
+    replacement = prepareReplacement(replacement);
+    count = Object.isUndefined(count) ? 1 : count;
+
+    return this.gsub(pattern, function(match) {
+      if (--count < 0) return match[0];
+      return replacement(match);
+    });
+  }
+
+  function scan(pattern, iterator) {
+    this.gsub(pattern, iterator);
+    return String(this);
+  }
+
+  function truncate(length, truncation) {
+    length = length || 30;
+    truncation = Object.isUndefined(truncation) ? '...' : truncation;
+    return this.length > length ?
+      this.slice(0, length - truncation.length) + truncation : String(this);
+  }
+
+  function strip() {
+    return this.replace(/^\s+/, '').replace(/\s+$/, '');
+  }
+
+  function stripTags() {
+    return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?>|<\/\w+>/gi, '');
+  }
+
+  function stripScripts() {
+    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
+  }
+
+  function extractScripts() {
+    var matchAll = new RegExp(Prototype.ScriptFragment, 'img'),
+        matchOne = new RegExp(Prototype.ScriptFragment, 'im');
+    return (this.match(matchAll) || []).map(function(scriptTag) {
+      return (scriptTag.match(matchOne) || ['', ''])[1];
+    });
+  }
+
+  function evalScripts() {
+    return this.extractScripts().map(function(script) { return eval(script); });
+  }
+
+  function escapeHTML() {
+    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
+  }
+
+  function unescapeHTML() {
+    return this.stripTags().replace(/&lt;/g,'<').replace(/&gt;/g,'>').replace(/&amp;/g,'&');
+  }
+
+
+  function toQueryParams(separator) {
+    var match = this.strip().match(/([^?#]*)(#.*)?$/);
+    if (!match) return { };
+
+    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
+      if ((pair = pair.split('='))[0]) {
+        var key = decodeURIComponent(pair.shift()),
+            value = pair.length > 1 ? pair.join('=') : pair[0];
+
+        if (value != undefined) value = decodeURIComponent(value);
+
+        if (key in hash) {
+          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
+          hash[key].push(value);
+        }
+        else hash[key] = value;
+      }
+      return hash;
+    });
+  }
+
+  function toArray() {
+    return this.split('');
+  }
+
+  function succ() {
+    return this.slice(0, this.length - 1) +
+      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
+  }
+
+  function times(count) {
+    return count < 1 ? '' : new Array(count + 1).join(this);
+  }
+
+  function camelize() {
+    return this.replace(/-+(.)?/g, function(match, chr) {
+      return chr ? chr.toUpperCase() : '';
+    });
+  }
+
+  function capitalize() {
+    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
+  }
+
+  function underscore() {
+    return this.replace(/::/g, '/')
+               .replace(/([A-Z]+)([A-Z][a-z])/g, '$1_$2')
+               .replace(/([a-z\d])([A-Z])/g, '$1_$2')
+               .replace(/-/g, '_')
+               .toLowerCase();
+  }
+
+  function dasherize() {
+    return this.replace(/_/g, '-');
+  }
+
+  function inspect(useDoubleQuotes) {
+    var escapedString = this.replace(/[\x00-\x1f\\]/g, function(character) {
+      if (character in String.specialChar) {
+        return String.specialChar[character];
+      }
+      return '\\u00' + character.charCodeAt().toPaddedString(2, 16);
+    });
+    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
+    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
+  }
+
+  function unfilterJSON(filter) {
+    return this.replace(filter || Prototype.JSONFilter, '$1');
+  }
+
+  function isJSON() {
+    var str = this;
+    if (str.blank()) return false;
+    str = str.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@');
+    str = str.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');
+    str = str.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
+    return (/^[\],:{}\s]*$/).test(str);
+  }
+
+  function evalJSON(sanitize) {
+    var json = this.unfilterJSON(),
+        cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+    if (cx.test(json)) {
+      json = json.replace(cx, function (a) {
+        return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+      });
+    }
+    try {
+      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
+    } catch (e) { }
+    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
+  }
+
+  function parseJSON() {
+    var json = this.unfilterJSON();
+    return JSON.parse(json);
+  }
+
+  function include(pattern) {
+    return this.indexOf(pattern) > -1;
+  }
+
+  function startsWith(pattern) {
+    return this.lastIndexOf(pattern, 0) === 0;
+  }
+
+  function endsWith(pattern) {
+    var d = this.length - pattern.length;
+    return d >= 0 && this.indexOf(pattern, d) === d;
+  }
+
+  function empty() {
+    return this == '';
+  }
+
+  function blank() {
+    return /^\s*$/.test(this);
+  }
+
+  function interpolate(object, pattern) {
+    return new Template(this, pattern).evaluate(object);
+  }
+
+  return {
+    gsub:           gsub,
+    sub:            sub,
+    scan:           scan,
+    truncate:       truncate,
+    strip:          String.prototype.trim || strip,
+    stripTags:      stripTags,
+    stripScripts:   stripScripts,
+    extractScripts: extractScripts,
+    evalScripts:    evalScripts,
+    escapeHTML:     escapeHTML,
+    unescapeHTML:   unescapeHTML,
+    toQueryParams:  toQueryParams,
+    parseQuery:     toQueryParams,
+    toArray:        toArray,
+    succ:           succ,
+    times:          times,
+    camelize:       camelize,
+    capitalize:     capitalize,
+    underscore:     underscore,
+    dasherize:      dasherize,
+    inspect:        inspect,
+    unfilterJSON:   unfilterJSON,
+    isJSON:         isJSON,
+    evalJSON:       NATIVE_JSON_PARSE_SUPPORT ? parseJSON : evalJSON,
+    include:        include,
+    startsWith:     startsWith,
+    endsWith:       endsWith,
+    empty:          empty,
+    blank:          blank,
+    interpolate:    interpolate
+  };
+})());
+
+var Template = Class.create({
+  initialize: function(template, pattern) {
+    this.template = template.toString();
+    this.pattern = pattern || Template.Pattern;
+  },
+
+  evaluate: function(object) {
+    if (object && Object.isFunction(object.toTemplateReplacements))
+      object = object.toTemplateReplacements();
+
+    return this.template.gsub(this.pattern, function(match) {
+      if (object == null) return (match[1] + '');
+
+      var before = match[1] || '';
+      if (before == '\\') return match[2];
+
+      var ctx = object, expr = match[3],
+          pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
+
+      match = pattern.exec(expr);
+      if (match == null) return before;
+
+      while (match != null) {
+        var comp = match[1].startsWith('[') ? match[2].replace(/\\\\]/g, ']') : match[1];
+        ctx = ctx[comp];
+        if (null == ctx || '' == match[3]) break;
+        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
+        match = pattern.exec(expr);
+      }
+
+      return before + String.interpret(ctx);
+    });
+  }
+});
+Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
+
+var $break = { };
+
+var Enumerable = (function() {
+  function each(iterator, context) {
+    try {
+      this._each(iterator, context);
+    } catch (e) {
+      if (e != $break) throw e;
+    }
+    return this;
+  }
+
+  function eachSlice(number, iterator, context) {
+    var index = -number, slices = [], array = this.toArray();
+    if (number < 1) return array;
+    while ((index += number) < array.length)
+      slices.push(array.slice(index, index+number));
+    return slices.collect(iterator, context);
+  }
+
+  function all(iterator, context) {
+    iterator = iterator || Prototype.K;
+    var result = true;
+    this.each(function(value, index) {
+      result = result && !!iterator.call(context, value, index, this);
+      if (!result) throw $break;
+    }, this);
+    return result;
+  }
+
+  function any(iterator, context) {
+    iterator = iterator || Prototype.K;
+    var result = false;
+    this.each(function(value, index) {
+      if (result = !!iterator.call(context, value, index, this))
+        throw $break;
+    }, this);
+    return result;
+  }
+
+  function collect(iterator, context) {
+    iterator = iterator || Prototype.K;
+    var results = [];
+    this.each(function(value, index) {
+      results.push(iterator.call(context, value, index, this));
+    }, this);
+    return results;
+  }
+
+  function detect(iterator, context) {
+    var result;
+    this.each(function(value, index) {
+      if (iterator.call(context, value, index, this)) {
+        result = value;
+        throw $break;
+      }
+    }, this);
+    return result;
+  }
+
+  function findAll(iterator, context) {
+    var results = [];
+    this.each(function(value, index) {
+      if (iterator.call(context, value, index, this))
+        results.push(value);
+    }, this);
+    return results;
+  }
+
+  function grep(filter, iterator, context) {
+    iterator = iterator || Prototype.K;
+    var results = [];
+
+    if (Object.isString(filter))
+      filter = new RegExp(RegExp.escape(filter));
+
+    this.each(function(value, index) {
+      if (filter.match(value))
+        results.push(iterator.call(context, value, index, this));
+    }, this);
+    return results;
+  }
+
+  function include(object) {
+    if (Object.isFunction(this.indexOf))
+      if (this.indexOf(object) != -1) return true;
+
+    var found = false;
+    this.each(function(value) {
+      if (value == object) {
+        found = true;
+        throw $break;
+      }
+    });
+    return found;
+  }
+
+  function inGroupsOf(number, fillWith) {
+    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
+    return this.eachSlice(number, function(slice) {
+      while(slice.length < number) slice.push(fillWith);
+      return slice;
+    });
+  }
+
+  function inject(memo, iterator, context) {
+    this.each(function(value, index) {
+      memo = iterator.call(context, memo, value, index, this);
+    }, this);
+    return memo;
+  }
+
+  function invoke(method) {
+    var args = $A(arguments).slice(1);
+    return this.map(function(value) {
+      return value[method].apply(value, args);
+    });
+  }
+
+  function max(iterator, context) {
+    iterator = iterator || Prototype.K;
+    var result;
+    this.each(function(value, index) {
+      value = iterator.call(context, value, index, this);
+      if (result == null || value >= result)
+        result = value;
+    }, this);
+    return result;
+  }
+
+  function min(iterator, context) {
+    iterator = iterator || Prototype.K;
+    var result;
+    this.each(function(value, index) {
+      value = iterator.call(context, value, index, this);
+      if (result == null || value < result)
+        result = value;
+    }, this);
+    return result;
+  }
+
+  function partition(iterator, context) {
+    iterator = iterator || Prototype.K;
+    var trues = [], falses = [];
+    this.each(function(value, index) {
+      (iterator.call(context, value, index, this) ?
+        trues : falses).push(value);
+    }, this);
+    return [trues, falses];
+  }
+
+  function pluck(property) {
+    var results = [];
+    this.each(function(value) {
+      results.push(value[property]);
+    });
+    return results;
+  }
+
+  function reject(iterator, context) {
+    var results = [];
+    this.each(function(value, index) {
+      if (!iterator.call(context, value, index, this))
+        results.push(value);
+    }, this);
+    return results;
+  }
+
+  function sortBy(iterator, context) {
+    return this.map(function(value, index) {
+      return {
+        value: value,
+        criteria: iterator.call(context, value, index, this)
+      };
+    }, this).sort(function(left, right) {
+      var a = left.criteria, b = right.criteria;
+      return a < b ? -1 : a > b ? 1 : 0;
+    }).pluck('value');
+  }
+
+  function toArray() {
+    return this.map();
+  }
+
+  function zip() {
+    var iterator = Prototype.K, args = $A(arguments);
+    if (Object.isFunction(args.last()))
+      iterator = args.pop();
+
+    var collections = [this].concat(args).map($A);
+    return this.map(function(value, index) {
+      return iterator(collections.pluck(index));
+    });
+  }
+
+  function size() {
+    return this.toArray().length;
+  }
+
+  function inspect() {
+    return '#<Enumerable:' + this.toArray().inspect() + '>';
+  }
+
+
+
+
+
+
+
+
+
+  return {
+    each:       each,
+    eachSlice:  eachSlice,
+    all:        all,
+    every:      all,
+    any:        any,
+    some:       any,
+    collect:    collect,
+    map:        collect,
+    detect:     detect,
+    findAll:    findAll,
+    select:     findAll,
+    filter:     findAll,
+    grep:       grep,
+    include:    include,
+    member:     include,
+    inGroupsOf: inGroupsOf,
+    inject:     inject,
+    invoke:     invoke,
+    max:        max,
+    min:        min,
+    partition:  partition,
+    pluck:      pluck,
+    reject:     reject,
+    sortBy:     sortBy,
+    toArray:    toArray,
+    entries:    toArray,
+    zip:        zip,
+    size:       size,
+    inspect:    inspect,
+    find:       detect
+  };
+})();
+
+function $A(iterable) {
+  if (!iterable) return [];
+  if ('toArray' in Object(iterable)) return iterable.toArray();
+  var length = iterable.length || 0, results = new Array(length);
+  while (length--) results[length] = iterable[length];
+  return results;
+}
+
+
+function $w(string) {
+  if (!Object.isString(string)) return [];
+  string = string.strip();
+  return string ? string.split(/\s+/) : [];
+}
+
+Array.from = $A;
+
+
+(function() {
+  var arrayProto = Array.prototype,
+      slice = arrayProto.slice,
+      _each = arrayProto.forEach; // use native browser JS 1.6 implementation if available
+
+  function each(iterator, context) {
+    for (var i = 0, length = this.length >>> 0; i < length; i++) {
+      if (i in this) iterator.call(context, this[i], i, this);
+    }
+  }
+  if (!_each) _each = each;
+
+  function clear() {
+    this.length = 0;
+    return this;
+  }
+
+  function first() {
+    return this[0];
+  }
+
+  function last() {
+    return this[this.length - 1];
+  }
+
+  function compact() {
+    return this.select(function(value) {
+      return value != null;
+    });
+  }
+
+  function flatten() {
+    return this.inject([], function(array, value) {
+      if (Object.isArray(value))
+        return array.concat(value.flatten());
+      array.push(value);
+      return array;
+    });
+  }
+
+  function without() {
+    var values = slice.call(arguments, 0);
+    return this.select(function(value) {
+      return !values.include(value);
+    });
+  }
+
+  function reverse(inline) {
+    return (inline === false ? this.toArray() : this)._reverse();
+  }
+
+  function uniq(sorted) {
+    return this.inject([], function(array, value, index) {
+      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
+        array.push(value);
+      return array;
+    });
+  }
+
+  function intersect(array) {
+    return this.uniq().findAll(function(item) {
+      return array.indexOf(item) !== -1;
+    });
+  }
+
+
+  function clone() {
+    return slice.call(this, 0);
+  }
+
+  function size() {
+    return this.length;
+  }
+
+  function inspect() {
+    return '[' + this.map(Object.inspect).join(', ') + ']';
+  }
+
+  function indexOf(item, i) {
+    if (this == null) throw new TypeError();
+
+    var array = Object(this), length = array.length >>> 0;
+    if (length === 0) return -1;
+
+    i = Number(i);
+    if (isNaN(i)) {
+      i = 0;
+    } else if (i !== 0 && isFinite(i)) {
+      i = (i > 0 ? 1 : -1) * Math.floor(Math.abs(i));
+    }
+
+    if (i > length) return -1;
+
+    var k = i >= 0 ? i : Math.max(length - Math.abs(i), 0);
+    for (; k < length; k++)
+      if (k in array && array[k] === item) return k;
+    return -1;
+  }
+
+
+  function lastIndexOf(item, i) {
+    if (this == null) throw new TypeError();
+
+    var array = Object(this), length = array.length >>> 0;
+    if (length === 0) return -1;
+
+    if (!Object.isUndefined(i)) {
+      i = Number(i);
+      if (isNaN(i)) {
+        i = 0;
+      } else if (i !== 0 && isFinite(i)) {
+        i = (i > 0 ? 1 : -1) * Math.floor(Math.abs(i));
+      }
+    } else {
+      i = length;
+    }
+
+    var k = i >= 0 ? Math.min(i, length - 1) :
+     length - Math.abs(i);
+
+    for (; k >= 0; k--)
+      if (k in array && array[k] === item) return k;
+    return -1;
+  }
+
+  function concat(_) {
+    var array = [], items = slice.call(arguments, 0), item, n = 0;
+    items.unshift(this);
+    for (var i = 0, length = items.length; i < length; i++) {
+      item = items[i];
+      if (Object.isArray(item) && !('callee' in item)) {
+        for (var j = 0, arrayLength = item.length; j < arrayLength; j++) {
+          if (j in item) array[n] = item[j];
+          n++;
+        }
+      } else {
+        array[n++] = item;
+      }
+    }
+    array.length = n;
+    return array;
+  }
+
+
+  function wrapNative(method) {
+    return function() {
+      if (arguments.length === 0) {
+        return method.call(this, Prototype.K);
+      } else if (arguments[0] === undefined) {
+        var args = slice.call(arguments, 1);
+        args.unshift(Prototype.K);
+        return method.apply(this, args);
+      } else {
+        return method.apply(this, arguments);
+      }
+    };
+  }
+
+
+  function map(iterator) {
+    if (this == null) throw new TypeError();
+    iterator = iterator || Prototype.K;
+
+    var object = Object(this);
+    var results = [], context = arguments[1], n = 0;
+
+    for (var i = 0, length = object.length >>> 0; i < length; i++) {
+      if (i in object) {
+        results[n] = iterator.call(context, object[i], i, object);
+      }
+      n++;
+    }
+    results.length = n;
+    return results;
+  }
+
+  if (arrayProto.map) {
+    map = wrapNative(Array.prototype.map);
+  }
+
+  function filter(iterator) {
+    if (this == null || !Object.isFunction(iterator))
+      throw new TypeError();
+
+    var object = Object(this);
+    var results = [], context = arguments[1], value;
+
+    for (var i = 0, length = object.length >>> 0; i < length; i++) {
+      if (i in object) {
+        value = object[i];
+        if (iterator.call(context, value, i, object)) {
+          results.push(value);
+        }
+      }
+    }
+    return results;
+  }
+
+  if (arrayProto.filter) {
+    filter = Array.prototype.filter;
+  }
+
+  function some(iterator) {
+    if (this == null) throw new TypeError();
+    iterator = iterator || Prototype.K;
+    var context = arguments[1];
+
+    var object = Object(this);
+    for (var i = 0, length = object.length >>> 0; i < length; i++) {
+      if (i in object && iterator.call(context, object[i], i, object)) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  if (arrayProto.some) {
+    var some = wrapNative(Array.prototype.some);
+  }
+
+
+  function every(iterator) {
+    if (this == null) throw new TypeError();
+    iterator = iterator || Prototype.K;
+    var context = arguments[1];
+
+    var object = Object(this);
+    for (var i = 0, length = object.length >>> 0; i < length; i++) {
+      if (i in object && !iterator.call(context, object[i], i, object)) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  if (arrayProto.every) {
+    var every = wrapNative(Array.prototype.every);
+  }
+
+  var _reduce = arrayProto.reduce;
+  function inject(memo, iterator) {
+    iterator = iterator || Prototype.K;
+    var context = arguments[2];
+    return _reduce.call(this, iterator.bind(context), memo);
+  }
+
+  if (!arrayProto.reduce) {
+    var inject = Enumerable.inject;
+  }
+
+  Object.extend(arrayProto, Enumerable);
+
+  if (!arrayProto._reverse)
+    arrayProto._reverse = arrayProto.reverse;
+
+  Object.extend(arrayProto, {
+    _each:     _each,
+
+    map:       map,
+    collect:   map,
+    select:    filter,
+    filter:    filter,
+    findAll:   filter,
+    some:      some,
+    any:       some,
+    every:     every,
+    all:       every,
+    inject:    inject,
+
+    clear:     clear,
+    first:     first,
+    last:      last,
+    compact:   compact,
+    flatten:   flatten,
+    without:   without,
+    reverse:   reverse,
+    uniq:      uniq,
+    intersect: intersect,
+    clone:     clone,
+    toArray:   clone,
+    size:      size,
+    inspect:   inspect
+  });
+
+  var CONCAT_ARGUMENTS_BUGGY = (function() {
+    return [].concat(arguments)[0][0] !== 1;
+  })(1,2);
+
+  if (CONCAT_ARGUMENTS_BUGGY) arrayProto.concat = concat;
+
+  if (!arrayProto.indexOf) arrayProto.indexOf = indexOf;
+  if (!arrayProto.lastIndexOf) arrayProto.lastIndexOf = lastIndexOf;
+})();
+function $H(object) {
+  return new Hash(object);
+};
+
+var Hash = Class.create(Enumerable, (function() {
+  function initialize(object) {
+    this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
+  }
+
+
+  function _each(iterator, context) {
+    for (var key in this._object) {
+      var value = this._object[key], pair = [key, value];
+      pair.key = key;
+      pair.value = value;
+      iterator.call(context, pair);
+    }
+  }
+
+  function set(key, value) {
+    return this._object[key] = value;
+  }
+
+  function get(key) {
+    if (this._object[key] !== Object.prototype[key])
+      return this._object[key];
+  }
+
+  function unset(key) {
+    var value = this._object[key];
+    delete this._object[key];
+    return value;
+  }
+
+  function toObject() {
+    return Object.clone(this._object);
+  }
+
+
+
+  function keys() {
+    return this.pluck('key');
+  }
+
+  function values() {
+    return this.pluck('value');
+  }
+
+  function index(value) {
+    var match = this.detect(function(pair) {
+      return pair.value === value;
+    });
+    return match && match.key;
+  }
+
+  function merge(object) {
+    return this.clone().update(object);
+  }
+
+  function update(object) {
+    return new Hash(object).inject(this, function(result, pair) {
+      result.set(pair.key, pair.value);
+      return result;
+    });
+  }
+
+  function toQueryPair(key, value) {
+    if (Object.isUndefined(value)) return key;
+
+    var value = String.interpret(value);
+
+    value = value.gsub(/(\r)?\n/, '\r\n');
+    value = encodeURIComponent(value);
+    value = value.gsub(/%20/, '+');
+    return key + '=' + value;
+  }
+
+  function toQueryString() {
+    return this.inject([], function(results, pair) {
+      var key = encodeURIComponent(pair.key), values = pair.value;
+
+      if (values && typeof values == 'object') {
+        if (Object.isArray(values)) {
+          var queryValues = [];
+          for (var i = 0, len = values.length, value; i < len; i++) {
+            value = values[i];
+            queryValues.push(toQueryPair(key, value));
+          }
+          return results.concat(queryValues);
+        }
+      } else results.push(toQueryPair(key, values));
+      return results;
+    }).join('&');
+  }
+
+  function inspect() {
+    return '#<Hash:{' + this.map(function(pair) {
+      return pair.map(Object.inspect).join(': ');
+    }).join(', ') + '}>';
+  }
+
+  function clone() {
+    return new Hash(this);
+  }
+
+  return {
+    initialize:             initialize,
+    _each:                  _each,
+    set:                    set,
+    get:                    get,
+    unset:                  unset,
+    toObject:               toObject,
+    toTemplateReplacements: toObject,
+    keys:                   keys,
+    values:                 values,
+    index:                  index,
+    merge:                  merge,
+    update:                 update,
+    toQueryString:          toQueryString,
+    inspect:                inspect,
+    toJSON:                 toObject,
+    clone:                  clone
+  };
+})());
+
+Hash.from = $H;
+Object.extend(Number.prototype, (function() {
+  function toColorPart() {
+    return this.toPaddedString(2, 16);
+  }
+
+  function succ() {
+    return this + 1;
+  }
+
+  function times(iterator, context) {
+    $R(0, this, true).each(iterator, context);
+    return this;
+  }
+
+  function toPaddedString(length, radix) {
+    var string = this.toString(radix || 10);
+    return '0'.times(length - string.length) + string;
+  }
+
+  function abs() {
+    return Math.abs(this);
+  }
+
+  function round() {
+    return Math.round(this);
+  }
+
+  function ceil() {
+    return Math.ceil(this);
+  }
+
+  function floor() {
+    return Math.floor(this);
+  }
+
+  return {
+    toColorPart:    toColorPart,
+    succ:           succ,
+    times:          times,
+    toPaddedString: toPaddedString,
+    abs:            abs,
+    round:          round,
+    ceil:           ceil,
+    floor:          floor
+  };
+})());
+
+function $R(start, end, exclusive) {
+  return new ObjectRange(start, end, exclusive);
+}
+
+var ObjectRange = Class.create(Enumerable, (function() {
+  function initialize(start, end, exclusive) {
+    this.start = start;
+    this.end = end;
+    this.exclusive = exclusive;
+  }
+
+  function _each(iterator, context) {
+    var value = this.start;
+    while (this.include(value)) {
+      iterator.call(context, value);
+      value = value.succ();
+    }
+  }
+
+  function include(value) {
+    if (value < this.start)
+      return false;
+    if (this.exclusive)
+      return value < this.end;
+    return value <= this.end;
+  }
+
+  return {
+    initialize: initialize,
+    _each:      _each,
+    include:    include
+  };
+})());
+
+
+
+var Abstract = { };
+
+
+var Try = {
+  these: function() {
+    var returnValue;
+
+    for (var i = 0, length = arguments.length; i < length; i++) {
+      var lambda = arguments[i];
+      try {
+        returnValue = lambda();
+        break;
+      } catch (e) { }
+    }
+
+    return returnValue;
+  }
+};
+
+var Ajax = {
+  getTransport: function() {
+    return Try.these(
+      function() {return new XMLHttpRequest()},
+      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
+      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
+    ) || false;
+  },
+
+  activeRequestCount: 0
+};
+
+Ajax.Responders = {
+  responders: [],
+
+  _each: function(iterator, context) {
+    this.responders._each(iterator, context);
+  },
+
+  register: function(responder) {
+    if (!this.include(responder))
+      this.responders.push(responder);
+  },
+
+  unregister: function(responder) {
+    this.responders = this.responders.without(responder);
+  },
+
+  dispatch: function(callback, request, transport, json) {
+    this.each(function(responder) {
+      if (Object.isFunction(responder[callback])) {
+        try {
+          responder[callback].apply(responder, [request, transport, json]);
+        } catch (e) { }
+      }
+    });
+  }
+};
+
+Object.extend(Ajax.Responders, Enumerable);
+
+Ajax.Responders.register({
+  onCreate:   function() { Ajax.activeRequestCount++ },
+  onComplete: function() { Ajax.activeRequestCount-- }
+});
+Ajax.Base = Class.create({
+  initialize: function(options) {
+    this.options = {
+      method:       'post',
+      asynchronous: true,
+      contentType:  'application/x-www-form-urlencoded',
+      encoding:     'UTF-8',
+      parameters:   '',
+      evalJSON:     true,
+      evalJS:       true
+    };
+    Object.extend(this.options, options || { });
+
+    this.options.method = this.options.method.toLowerCase();
+
+    if (Object.isHash(this.options.parameters))
+      this.options.parameters = this.options.parameters.toObject();
+  }
+});
+Ajax.Request = Class.create(Ajax.Base, {
+  _complete: false,
+
+  initialize: function($super, url, options) {
+    $super(options);
+    this.transport = Ajax.getTransport();
+    this.request(url);
+  },
+
+  request: function(url) {
+    this.url = url;
+    this.method = this.options.method;
+    var params = Object.isString(this.options.parameters) ?
+          this.options.parameters :
+          Object.toQueryString(this.options.parameters);
+
+    if (!['get', 'post'].include(this.method)) {
+      params += (params ? '&' : '') + "_method=" + this.method;
+      this.method = 'post';
+    }
+
+    if (params && this.method === 'get') {
+      this.url += (this.url.include('?') ? '&' : '?') + params;
+    }
+
+    this.parameters = params.toQueryParams();
+
+    try {
+      var response = new Ajax.Response(this);
+      if (this.options.onCreate) this.options.onCreate(response);
+      Ajax.Responders.dispatch('onCreate', this, response);
+
+      this.transport.open(this.method.toUpperCase(), this.url,
+        this.options.asynchronous);
+
+      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);
+
+      this.transport.onreadystatechange = this.onStateChange.bind(this);
+      this.setRequestHeaders();
+
+      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
+      this.transport.send(this.body);
+
+      /* Force Firefox to handle ready state 4 for synchronous requests */
+      if (!this.options.asynchronous && this.transport.overrideMimeType)
+        this.onStateChange();
+
+    }
+    catch (e) {
+      this.dispatchException(e);
+    }
+  },
+
+  onStateChange: function() {
+    var readyState = this.transport.readyState;
+    if (readyState > 1 && !((readyState == 4) && this._complete))
+      this.respondToReadyState(this.transport.readyState);
+  },
+
+  setRequestHeaders: function() {
+    var headers = {
+      'X-Requested-With': 'XMLHttpRequest',
+      'X-Prototype-Version': Prototype.Version,
+      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
+    };
+
+    if (this.method == 'post') {
+      headers['Content-type'] = this.options.contentType +
+        (this.options.encoding ? '; charset=' + this.options.encoding : '');
+
+      /* Force "Connection: close" for older Mozilla browsers to work
+       * around a bug where XMLHttpRequest sends an incorrect
+       * Content-length header. See Mozilla Bugzilla #246651.
+       */
+      if (this.transport.overrideMimeType &&
+          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
+            headers['Connection'] = 'close';
+    }
+
+    if (typeof this.options.requestHeaders == 'object') {
+      var extras = this.options.requestHeaders;
+
+      if (Object.isFunction(extras.push))
+        for (var i = 0, length = extras.length; i < length; i += 2)
+          headers[extras[i]] = extras[i+1];
+      else
+        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
+    }
+
+    for (var name in headers)
+      this.transport.setRequestHeader(name, headers[name]);
+  },
+
+  success: function() {
+    var status = this.getStatus();
+    return !status || (status >= 200 && status < 300) || status == 304;
+  },
+
+  getStatus: function() {
+    try {
+      if (this.transport.status === 1223) return 204;
+      return this.transport.status || 0;
+    } catch (e) { return 0 }
+  },
+
+  respondToReadyState: function(readyState) {
+    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);
+
+    if (state == 'Complete') {
+      try {
+        this._complete = true;
+        (this.options['on' + response.status]
+         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
+         || Prototype.emptyFunction)(response, response.headerJSON);
+      } catch (e) {
+        this.dispatchException(e);
+      }
+
+      var contentType = response.getHeader('Content-type');
+      if (this.options.evalJS == 'force'
+          || (this.options.evalJS && this.isSameOrigin() && contentType
+          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
+        this.evalResponse();
+    }
+
+    try {
+      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
+      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
+    } catch (e) {
+      this.dispatchException(e);
+    }
+
+    if (state == 'Complete') {
+      this.transport.onreadystatechange = Prototype.emptyFunction;
+    }
+  },
+
+  isSameOrigin: function() {
+    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
+    return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
+      protocol: location.protocol,
+      domain: document.domain,
+      port: location.port ? ':' + location.port : ''
+    }));
+  },
+
+  getHeader: function(name) {
+    try {
+      return this.transport.getResponseHeader(name) || null;
+    } catch (e) { return null; }
+  },
+
+  evalResponse: function() {
+    try {
+      return eval((this.transport.responseText || '').unfilterJSON());
+    } catch (e) {
+      this.dispatchException(e);
+    }
+  },
+
+  dispatchException: function(exception) {
+    (this.options.onException || Prototype.emptyFunction)(this, exception);
+    Ajax.Responders.dispatch('onException', this, exception);
+  }
+});
+
+Ajax.Request.Events =
+  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
+
+
+
+
+
+
+
+
+Ajax.Response = Class.create({
+  initialize: function(request){
+    this.request = request;
+    var transport  = this.transport  = request.transport,
+        readyState = this.readyState = transport.readyState;
+
+    if ((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
+      this.status       = this.getStatus();
+      this.statusText   = this.getStatusText();
+      this.responseText = String.interpret(transport.responseText);
+      this.headerJSON   = this._getHeaderJSON();
+    }
+
+    if (readyState == 4) {
+      var xml = transport.responseXML;
+      this.responseXML  = Object.isUndefined(xml) ? null : xml;
+      this.responseJSON = this._getResponseJSON();
+    }
+  },
+
+  status:      0,
+
+  statusText: '',
+
+  getStatus: Ajax.Request.prototype.getStatus,
+
+  getStatusText: function() {
+    try {
+      return this.transport.statusText || '';
+    } catch (e) { return '' }
+  },
+
+  getHeader: Ajax.Request.prototype.getHeader,
+
+  getAllHeaders: function() {
+    try {
+      return this.getAllResponseHeaders();
+    } catch (e) { return null }
+  },
+
+  getResponseHeader: function(name) {
+    return this.transport.getResponseHeader(name);
+  },
+
+  getAllResponseHeaders: function() {
+    return this.transport.getAllResponseHeaders();
+  },
+
+  _getHeaderJSON: function() {
+    var json = this.getHeader('X-JSON');
+    if (!json) return null;
+
+    try {
+      json = decodeURIComponent(escape(json));
+    } catch(e) {
+    }
+
+    try {
+      return json.evalJSON(this.request.options.sanitizeJSON ||
+        !this.request.isSameOrigin());
+    } catch (e) {
+      this.request.dispatchException(e);
+    }
+  },
+
+  _getResponseJSON: function() {
+    var options = this.request.options;
+    if (!options.evalJSON || (options.evalJSON != 'force' &&
+      !(this.getHeader('Content-type') || '').include('application/json')) ||
+        this.responseText.blank())
+          return null;
+    try {
+      return this.responseText.evalJSON(options.sanitizeJSON ||
+        !this.request.isSameOrigin());
+    } catch (e) {
+      this.request.dispatchException(e);
+    }
+  }
+});
+
+Ajax.Updater = Class.create(Ajax.Request, {
+  initialize: function($super, container, url, options) {
+    this.container = {
+      success: (container.success || container),
+      failure: (container.failure || (container.success ? null : container))
+    };
+
+    options = Object.clone(options);
+    var onComplete = options.onComplete;
+    options.onComplete = (function(response, json) {
+      this.updateContent(response.responseText);
+      if (Object.isFunction(onComplete)) onComplete(response, json);
+    }).bind(this);
+
+    $super(url, options);
+  },
+
+  updateContent: function(responseText) {
+    var receiver = this.container[this.success() ? 'success' : 'failure'],
+        options = this.options;
+
+    if (!options.evalScripts) responseText = responseText.stripScripts();
+
+    if (receiver = $(receiver)) {
+      if (options.insertion) {
+        if (Object.isString(options.insertion)) {
+          var insertion = { }; insertion[options.insertion] = responseText;
+          receiver.insert(insertion);
+        }
+        else options.insertion(receiver, responseText);
+      }
+      else receiver.update(responseText);
+    }
+  }
+});
+
+Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
+  initialize: function($super, container, url, options) {
+    $super(options);
+    this.onComplete = this.options.onComplete;
+
+    this.frequency = (this.options.frequency || 2);
+    this.decay = (this.options.decay || 1);
+
+    this.updater = { };
+    this.container = container;
+    this.url = url;
+
+    this.start();
+  },
+
+  start: function() {
+    this.options.onComplete = this.updateComplete.bind(this);
+    this.onTimerEvent();
+  },
+
+  stop: function() {
+    this.updater.options.onComplete = undefined;
+    clearTimeout(this.timer);
+    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
+  },
+
+  updateComplete: function(response) {
+    if (this.options.decay) {
+      this.decay = (response.responseText == this.lastText ?
+        this.decay * this.options.decay : 1);
+
+      this.lastText = response.responseText;
+    }
+    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
+  },
+
+  onTimerEvent: function() {
+    this.updater = new Ajax.Updater(this.container, this.url, this.options);
+  }
+});
+
+(function(GLOBAL) {
+
+  var UNDEFINED;
+  var SLICE = Array.prototype.slice;
+
+  var DIV = document.createElement('div');
+
+
+  function $(element) {
+    if (arguments.length > 1) {
+      for (var i = 0, elements = [], length = arguments.length; i < length; i++)
+        elements.push($(arguments[i]));
+      return elements;
+    }
+
+    if (Object.isString(element))
+      element = document.getElementById(element);
+    return Element.extend(element);
+  }
+
+  GLOBAL.$ = $;
+
+
+  if (!GLOBAL.Node) GLOBAL.Node = {};
+
+  if (!GLOBAL.Node.ELEMENT_NODE) {
+    Object.extend(GLOBAL.Node, {
+      ELEMENT_NODE:                1,
+      ATTRIBUTE_NODE:              2,
+      TEXT_NODE:                   3,
+      CDATA_SECTION_NODE:          4,
+      ENTITY_REFERENCE_NODE:       5,
+      ENTITY_NODE:                 6,
+      PROCESSING_INSTRUCTION_NODE: 7,
+      COMMENT_NODE:                8,
+      DOCUMENT_NODE:               9,
+      DOCUMENT_TYPE_NODE:         10,
+      DOCUMENT_FRAGMENT_NODE:     11,
+      NOTATION_NODE:              12
+    });
+  }
+
+  var ELEMENT_CACHE = {};
+
+  function shouldUseCreationCache(tagName, attributes) {
+    if (tagName === 'select') return false;
+    if ('type' in attributes) return false;
+    return true;
+  }
+
+  var HAS_EXTENDED_CREATE_ELEMENT_SYNTAX = (function(){
+    try {
+      var el = document.createElement('<input name="x">');
+      return el.tagName.toLowerCase() === 'input' && el.name === 'x';
+    }
+    catch(err) {
+      return false;
+    }
+  })();
+
+
+  var oldElement = GLOBAL.Element;
+  function Element(tagName, attributes) {
+    attributes = attributes || {};
+    tagName = tagName.toLowerCase();
+
+    if (HAS_EXTENDED_CREATE_ELEMENT_SYNTAX && attributes.name) {
+      tagName = '<' + tagName + ' name="' + attributes.name + '">';
+      delete attributes.name;
+      return Element.writeAttribute(document.createElement(tagName), attributes);
+    }
+
+    if (!ELEMENT_CACHE[tagName])
+      ELEMENT_CACHE[tagName] = Element.extend(document.createElement(tagName));
+
+    var node = shouldUseCreationCache(tagName, attributes) ?
+     ELEMENT_CACHE[tagName].cloneNode(false) : document.createElement(tagName);
+
+    return Element.writeAttribute(node, attributes);
+  }
+
+  GLOBAL.Element = Element;
+
+  Object.extend(GLOBAL.Element, oldElement || {});
+  if (oldElement) GLOBAL.Element.prototype = oldElement.prototype;
+
+  Element.Methods = { ByTag: {}, Simulated: {} };
+
+  var methods = {};
+
+  var INSPECT_ATTRIBUTES = { id: 'id', className: 'class' };
+  function inspect(element) {
+    element = $(element);
+    var result = '<' + element.tagName.toLowerCase();
+
+    var attribute, value;
+    for (var property in INSPECT_ATTRIBUTES) {
+      attribute = INSPECT_ATTRIBUTES[property];
+      value = (element[property] || '').toString();
+      if (value) result += ' ' + attribute + '=' + value.inspect(true);
+    }
+
+    return result + '>';
+  }
+
+  methods.inspect = inspect;
+
+
+  function visible(element) {
+    return $(element).style.display !== 'none';
+  }
+
+  function toggle(element, bool) {
+    element = $(element);
+    if (Object.isUndefined(bool))
+      bool = !Element.visible(element);
+    Element[bool ? 'show' : 'hide'](element);
+
+    return element;
+  }
+
+  function hide(element) {
+    element = $(element);
+    element.style.display = 'none';
+    return element;
+  }
+
+  function show(element) {
+    element = $(element);
+    element.style.display = '';
+    return element;
+  }
+
+
+  Object.extend(methods, {
+    visible: visible,
+    toggle:  toggle,
+    hide:    hide,
+    show:    show
+  });
+
+
+  function remove(element) {
+    element = $(element);
+    element.parentNode.removeChild(element);
+    return element;
+  }
+
+  var SELECT_ELEMENT_INNERHTML_BUGGY = (function(){
+    var el = document.createElement("select"),
+        isBuggy = true;
+    el.innerHTML = "<option value=\"test\">test</option>";
+    if (el.options && el.options[0]) {
+      isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";
+    }
+    el = null;
+    return isBuggy;
+  })();
+
+  var TABLE_ELEMENT_INNERHTML_BUGGY = (function(){
+    try {
+      var el = document.createElement("table");
+      if (el && el.tBodies) {
+        el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";
+        var isBuggy = typeof el.tBodies[0] == "undefined";
+        el = null;
+        return isBuggy;
+      }
+    } catch (e) {
+      return true;
+    }
+  })();
+
+  var LINK_ELEMENT_INNERHTML_BUGGY = (function() {
+    try {
+      var el = document.createElement('div');
+      el.innerHTML = "<link />";
+      var isBuggy = (el.childNodes.length === 0);
+      el = null;
+      return isBuggy;
+    } catch(e) {
+      return true;
+    }
+  })();
+
+  var ANY_INNERHTML_BUGGY = SELECT_ELEMENT_INNERHTML_BUGGY ||
+   TABLE_ELEMENT_INNERHTML_BUGGY || LINK_ELEMENT_INNERHTML_BUGGY;
+
+  var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function () {
+    var s = document.createElement("script"),
+        isBuggy = false;
+    try {
+      s.appendChild(document.createTextNode(""));
+      isBuggy = !s.firstChild ||
+        s.firstChild && s.firstChild.nodeType !== 3;
+    } catch (e) {
+      isBuggy = true;
+    }
+    s = null;
+    return isBuggy;
+  })();
+
+  function update(element, content) {
+    element = $(element);
+
+    var descendants = element.getElementsByTagName('*'),
+     i = descendants.length;
+    while (i--) purgeElement(descendants[i]);
+
+    if (content && content.toElement)
+      content = content.toElement();
+
+    if (Object.isElement(content))
+      return element.update().insert(content);
+
+
+    content = Object.toHTML(content);
+    var tagName = element.tagName.toUpperCase();
+
+    if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {
+      element.text = content;
+      return element;
+    }
+
+    if (ANY_INNERHTML_BUGGY) {
+      if (tagName in INSERTION_TRANSLATIONS.tags) {
+        while (element.firstChild)
+          element.removeChild(element.firstChild);
+
+        var nodes = getContentFromAnonymousElement(tagName, content.stripScripts());
+        for (var i = 0, node; node = nodes[i]; i++)
+          element.appendChild(node);
+
+      } else if (LINK_ELEMENT_INNERHTML_BUGGY && Object.isString(content) && content.indexOf('<link') > -1) {
+        while (element.firstChild)
+          element.removeChild(element.firstChild);
+
+        var nodes = getContentFromAnonymousElement(tagName,
+         content.stripScripts(), true);
+
+        for (var i = 0, node; node = nodes[i]; i++)
+          element.appendChild(node);
+      } else {
+        element.innerHTML = content.stripScripts();
+      }
+    } else {
+      element.innerHTML = content.stripScripts();
+    }
+
+    content.evalScripts.bind(content).defer();
+    return element;
+  }
+
+  function replace(element, content) {
+    element = $(element);
+
+    if (content && content.toElement) {
+      content = content.toElement();
+    } else if (!Object.isElement(content)) {
+      content = Object.toHTML(content);
+      var range = element.ownerDocument.createRange();
+      range.selectNode(element);
+      content.evalScripts.bind(content).defer();
+      content = range.createContextualFragment(content.stripScripts());
+    }
+
+    element.parentNode.replaceChild(content, element);
+    return element;
+  }
+
+  var INSERTION_TRANSLATIONS = {
+    before: function(element, node) {
+      element.parentNode.insertBefore(node, element);
+    },
+    top: function(element, node) {
+      element.insertBefore(node, element.firstChild);
+    },
+    bottom: function(element, node) {
+      element.appendChild(node);
+    },
+    after: function(element, node) {
+      element.parentNode.insertBefore(node, element.nextSibling);
+    },
+
+    tags: {
+      TABLE:  ['<table>',                '</table>',                   1],
+      TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
+      TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
+      TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
+      SELECT: ['<select>',               '</select>',                  1]
+    }
+  };
+
+  var tags = INSERTION_TRANSLATIONS.tags;
+
+  Object.extend(tags, {
+    THEAD: tags.TBODY,
+    TFOOT: tags.TBODY,
+    TH:    tags.TD
+  });
+
+  function replace_IE(element, content) {
+    element = $(element);
+    if (content && content.toElement)
+      content = content.toElement();
+    if (Object.isElement(content)) {
+      element.parentNode.replaceChild(content, element);
+      return element;
+    }
+
+    content = Object.toHTML(content);
+    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
+
+    if (tagName in INSERTION_TRANSLATIONS.tags) {
+      var nextSibling = Element.next(element);
+      var fragments = getContentFromAnonymousElement(
+       tagName, content.stripScripts());
+
+      parent.removeChild(element);
+
+      var iterator;
+      if (nextSibling)
+        iterator = function(node) { parent.insertBefore(node, nextSibling) };
+      else
+        iterator = function(node) { parent.appendChild(node); }
+
+      fragments.each(iterator);
+    } else {
+      element.outerHTML = content.stripScripts();
+    }
+
+    content.evalScripts.bind(content).defer();
+    return element;
+  }
+
+  if ('outerHTML' in document.documentElement)
+    replace = replace_IE;
+
+  function isContent(content) {
+    if (Object.isUndefined(content) || content === null) return false;
+
+    if (Object.isString(content) || Object.isNumber(content)) return true;
+    if (Object.isElement(content)) return true;
+    if (content.toElement || content.toHTML) return true;
+
+    return false;
+  }
+
+  function insertContentAt(element, content, position) {
+    position   = position.toLowerCase();
+    var method = INSERTION_TRANSLATIONS[position];
+
+    if (content && content.toElement) content = content.toElement();
+    if (Object.isElement(content)) {
+      method(element, content);
+      return element;
+    }
+
+    content = Object.toHTML(content);
+    var tagName = ((position === 'before' || position === 'after') ?
+     element.parentNode : element).tagName.toUpperCase();
+
+    var childNodes = getContentFromAnonymousElement(tagName, content.stripScripts());
+
+    if (position === 'top' || position === 'after') childNodes.reverse();
+
+    for (var i = 0, node; node = childNodes[i]; i++)
+      method(element, node);
+
+    content.evalScripts.bind(content).defer();
+  }
+
+  function insert(element, insertions) {
+    element = $(element);
+
+    if (isContent(insertions))
+      insertions = { bottom: insertions };
+
+    for (var position in insertions)
+      insertContentAt(element, insertions[position], position);
+
+    return element;
+  }
+
+  function wrap(element, wrapper, attributes) {
+    element = $(element);
+
+    if (Object.isElement(wrapper)) {
+      $(wrapper).writeAttribute(attributes || {});
+    } else if (Object.isString(wrapper)) {
+      wrapper = new Element(wrapper, attributes);
+    } else {
+      wrapper = new Element('div', wrapper);
+    }
+
+    if (element.parentNode)
+      element.parentNode.replaceChild(wrapper, element);
+
+    wrapper.appendChild(element);
+
+    return wrapper;
+  }
+
+  function cleanWhitespace(element) {
+    element = $(element);
+    var node = element.firstChild;
+
+    while (node) {
+      var nextNode = node.nextSibling;
+      if (node.nodeType === Node.TEXT_NODE && !/\S/.test(node.nodeValue))
+        element.removeChild(node);
+      node = nextNode;
+    }
+    return element;
+  }
+
+  function empty(element) {
+    return $(element).innerHTML.blank();
+  }
+
+  function getContentFromAnonymousElement(tagName, html, force) {
+    var t = INSERTION_TRANSLATIONS.tags[tagName], div = DIV;
+
+    var workaround = !!t;
+    if (!workaround && force) {
+      workaround = true;
+      t = ['', '', 0];
+    }
+
+    if (workaround) {
+      div.innerHTML = '&#160;' + t[0] + html + t[1];
+      div.removeChild(div.firstChild);
+      for (var i = t[2]; i--; )
+        div = div.firstChild;
+    } else {
+      div.innerHTML = html;
+    }
+
+    return $A(div.childNodes);
+  }
+
+  function clone(element, deep) {
+    if (!(element = $(element))) return;
+    var clone = element.cloneNode(deep);
+    if (!HAS_UNIQUE_ID_PROPERTY) {
+      clone._prototypeUID = UNDEFINED;
+      if (deep) {
+        var descendants = Element.select(clone, '*'),
+         i = descendants.length;
+        while (i--)
+          descendants[i]._prototypeUID = UNDEFINED;
+      }
+    }
+    return Element.extend(clone);
+  }
+
+  function purgeElement(element) {
+    var uid = getUniqueElementID(element);
+    if (uid) {
+      Element.stopObserving(element);
+      if (!HAS_UNIQUE_ID_PROPERTY)
+        element._prototypeUID = UNDEFINED;
+      delete Element.Storage[uid];
+    }
+  }
+
+  function purgeCollection(elements) {
+    var i = elements.length;
+    while (i--)
+      purgeElement(elements[i]);
+  }
+
+  function purgeCollection_IE(elements) {
+    var i = elements.length, element, uid;
+    while (i--) {
+      element = elements[i];
+      uid = getUniqueElementID(element);
+      delete Element.Storage[uid];
+      delete Event.cache[uid];
+    }
+  }
+
+  if (HAS_UNIQUE_ID_PROPERTY) {
+    purgeCollection = purgeCollection_IE;
+  }
+
+
+  function purge(element) {
+    if (!(element = $(element))) return;
+    purgeElement(element);
+
+    var descendants = element.getElementsByTagName('*'),
+     i = descendants.length;
+
+    while (i--) purgeElement(descendants[i]);
+
+    return null;
+  }
+
+  Object.extend(methods, {
+    remove:  remove,
+    update:  update,
+    replace: replace,
+    insert:  insert,
+    wrap:    wrap,
+    cleanWhitespace: cleanWhitespace,
+    empty:   empty,
+    clone:   clone,
+    purge:   purge
+  });
+
+
+
+  function recursivelyCollect(element, property, maximumLength) {
+    element = $(element);
+    maximumLength = maximumLength || -1;
+    var elements = [];
+
+    while (element = element[property]) {
+      if (element.nodeType === Node.ELEMENT_NODE)
+        elements.push(Element.extend(element));
+
+      if (elements.length === maximumLength) break;
+    }
+
+    return elements;
+  }
+
+
+  function ancestors(element) {
+    return recursivelyCollect(element, 'parentNode');
+  }
+
+  function descendants(element) {
+    return Element.select(element, '*');
+  }
+
+  function firstDescendant(element) {
+    element = $(element).firstChild;
+    while (element && element.nodeType !== Node.ELEMENT_NODE)
+      element = element.nextSibling;
+
+    return $(element);
+  }
+
+  function immediateDescendants(element) {
+    var results = [], child = $(element).firstChild;
+
+    while (child) {
+      if (child.nodeType === Node.ELEMENT_NODE)
+        results.push(Element.extend(child));
+
+      child = child.nextSibling;
+    }
+
+    return results;
+  }
+
+  function previousSiblings(element) {
+    return recursivelyCollect(element, 'previousSibling');
+  }
+
+  function nextSiblings(element) {
+    return recursivelyCollect(element, 'nextSibling');
+  }
+
+  function siblings(element) {
+    element = $(element);
+    var previous = previousSiblings(element),
+     next = nextSiblings(element);
+    return previous.reverse().concat(next);
+  }
+
+  function match(element, selector) {
+    element = $(element);
+
+    if (Object.isString(selector))
+      return Prototype.Selector.match(element, selector);
+
+    return selector.match(element);
+  }
+
+
+  function _recursivelyFind(element, property, expression, index) {
+    element = $(element), expression = expression || 0, index = index || 0;
+    if (Object.isNumber(expression)) {
+      index = expression, expression = null;
+    }
+
+    while (element = element[property]) {
+      if (element.nodeType !== 1) continue;
+      if (expression && !Prototype.Selector.match(element, expression))
+        continue;
+      if (--index >= 0) continue;
+
+      return Element.extend(element);
+    }
+  }
+
+
+  function up(element, expression, index) {
+    element = $(element);
+
+    if (arguments.length === 1) return $(element.parentNode);
+    return _recursivelyFind(element, 'parentNode', expression, index);
+  }
+
+  function down(element, expression, index) {
+    element = $(element), expression = expression || 0, index = index || 0;
+
+    if (Object.isNumber(expression))
+      index = expression, expression = '*';
+
+    var node = Prototype.Selector.select(expression, element)[index];
+    return Element.extend(node);
+  }
+
+  function previous(element, expression, index) {
+    return _recursivelyFind(element, 'previousSibling', expression, index);
+  }
+
+  function next(element, expression, index) {
+    return _recursivelyFind(element, 'nextSibling', expression, index);
+  }
+
+  function select(element) {
+    element = $(element);
+    var expressions = SLICE.call(arguments, 1).join(', ');
+    return Prototype.Selector.select(expressions, element);
+  }
+
+  function adjacent(element) {
+    element = $(element);
+    var expressions = SLICE.call(arguments, 1).join(', ');
+    var siblings = Element.siblings(element), results = [];
+    for (var i = 0, sibling; sibling = siblings[i]; i++) {
+      if (Prototype.Selector.match(sibling, expressions))
+        results.push(sibling);
+    }
+
+    return results;
+  }
+
+  function descendantOf_DOM(element, ancestor) {
+    element = $(element), ancestor = $(ancestor);
+    while (element = element.parentNode)
+      if (element === ancestor) return true;
+    return false;
+  }
+
+  function descendantOf_contains(element, ancestor) {
+    element = $(element), ancestor = $(ancestor);
+    if (!ancestor.contains) return descendantOf_DOM(element, ancestor);
+    return ancestor.contains(element) && ancestor !== element;
+  }
+
+  function descendantOf_compareDocumentPosition(element, ancestor) {
+    element = $(element), ancestor = $(ancestor);
+    return (element.compareDocumentPosition(ancestor) & 8) === 8;
+  }
+
+  var descendantOf;
+  if (DIV.compareDocumentPosition) {
+    descendantOf = descendantOf_compareDocumentPosition;
+  } else if (DIV.contains) {
+    descendantOf = descendantOf_contains;
+  } else {
+    descendantOf = descendantOf_DOM;
+  }
+
+
+  Object.extend(methods, {
+    recursivelyCollect:   recursivelyCollect,
+    ancestors:            ancestors,
+    descendants:          descendants,
+    firstDescendant:      firstDescendant,
+    immediateDescendants: immediateDescendants,
+    previousSiblings:     previousSiblings,
+    nextSiblings:         nextSiblings,
+    siblings:             siblings,
+    match:                match,
+    up:                   up,
+    down:                 down,
+    previous:             previous,
+    next:                 next,
+    select:               select,
+    adjacent:             adjacent,
+    descendantOf:         descendantOf,
+
+    getElementsBySelector: select,
+
+    childElements:         immediateDescendants
+  });
+
+
+  var idCounter = 1;
+  function identify(element) {
+    element = $(element);
+    var id = Element.readAttribute(element, 'id');
+    if (id) return id;
+
+    do { id = 'anonymous_element_' + idCounter++ } while ($(id));
+
+    Element.writeAttribute(element, 'id', id);
+    return id;
+  }
+
+
+  function readAttribute(element, name) {
+    return $(element).getAttribute(name);
+  }
+
+  function readAttribute_IE(element, name) {
+    element = $(element);
+
+    var table = ATTRIBUTE_TRANSLATIONS.read;
+    if (table.values[name])
+      return table.values[name](element, name);
+
+    if (table.names[name]) name = table.names[name];
+
+    if (name.include(':')) {
+      if (!element.attributes || !element.attributes[name]) return null;
+      return element.attributes[name].value;
+    }
+
+    return element.getAttribute(name);
+  }
+
+  function readAttribute_Opera(element, name) {
+    if (name === 'title') return element.title;
+    return element.getAttribute(name);
+  }
+
+  var PROBLEMATIC_ATTRIBUTE_READING = (function() {
+    DIV.setAttribute('onclick', Prototype.emptyFunction);
+    var value = DIV.getAttribute('onclick');
+    var isFunction = (typeof value === 'function');
+    DIV.removeAttribute('onclick');
+    return isFunction;
+  })();
+
+  if (PROBLEMATIC_ATTRIBUTE_READING) {
+    readAttribute = readAttribute_IE;
+  } else if (Prototype.Browser.Opera) {
+    readAttribute = readAttribute_Opera;
+  }
+
+
+  function writeAttribute(element, name, value) {
+    element = $(element);
+    var attributes = {}, table = ATTRIBUTE_TRANSLATIONS.write;
+
+    if (typeof name === 'object') {
+      attributes = name;
+    } else {
+      attributes[name] = Object.isUndefined(value) ? true : value;
+    }
+
+    for (var attr in attributes) {
+      name = table.names[attr] || attr;
+      value = attributes[attr];
+      if (table.values[attr])
+        name = table.values[attr](element, value);
+      if (value === false || value === null)
+        element.removeAttribute(name);
+      else if (value === true)
+        element.setAttribute(name, name);
+      else element.setAttribute(name, value);
+    }
+
+    return element;
+  }
+
+  function hasAttribute(element, attribute) {
+    attribute = ATTRIBUTE_TRANSLATIONS.has[attribute] || attribute;
+    var node = $(element).getAttributeNode(attribute);
+    return !!(node && node.specified);
+  }
+
+  GLOBAL.Element.Methods.Simulated.hasAttribute = hasAttribute;
+
+  function classNames(element) {
+    return new Element.ClassNames(element);
+  }
+
+  var regExpCache = {};
+  function getRegExpForClassName(className) {
+    if (regExpCache[className]) return regExpCache[className];
+
+    var re = new RegExp("(^|\\s+)" + className + "(\\s+|$)");
+    regExpCache[className] = re;
+    return re;
+  }
+
+  function hasClassName(element, className) {
+    if (!(element = $(element))) return;
+
+    var elementClassName = element.className;
+
+    if (elementClassName.length === 0) return false;
+    if (elementClassName === className) return true;
+
+    return getRegExpForClassName(className).test(elementClassName);
+  }
+
+  function addClassName(element, className) {
+    if (!(element = $(element))) return;
+
+    if (!hasClassName(element, className))
+      element.className += (element.className ? ' ' : '') + className;
+
+    return element;
+  }
+
+  function removeClassName(element, className) {
+    if (!(element = $(element))) return;
+
+    element.className = element.className.replace(
+     getRegExpForClassName(className), ' ').strip();
+
+    return element;
+  }
+
+  function toggleClassName(element, className, bool) {
+    if (!(element = $(element))) return;
+
+    if (Object.isUndefined(bool))
+      bool = !hasClassName(element, className);
+
+    var method = Element[bool ? 'addClassName' : 'removeClassName'];
+    return method(element, className);
+  }
+
+  var ATTRIBUTE_TRANSLATIONS = {};
+
+  var classProp = 'className', forProp = 'for';
+
+  DIV.setAttribute(classProp, 'x');
+  if (DIV.className !== 'x') {
+    DIV.setAttribute('class', 'x');
+    if (DIV.className === 'x')
+      classProp = 'class';
+  }
+
+  var LABEL = document.createElement('label');
+  LABEL.setAttribute(forProp, 'x');
+  if (LABEL.htmlFor !== 'x') {
+    LABEL.setAttribute('htmlFor', 'x');
+    if (LABEL.htmlFor === 'x')
+      forProp = 'htmlFor';
+  }
+  LABEL = null;
+
+  function _getAttr(element, attribute) {
+    return element.getAttribute(attribute);
+  }
+
+  function _getAttr2(element, attribute) {
+    return element.getAttribute(attribute, 2);
+  }
+
+  function _getAttrNode(element, attribute) {
+    var node = element.getAttributeNode(attribute);
+    return node ? node.value : '';
+  }
+
+  function _getFlag(element, attribute) {
+    return $(element).hasAttribute(attribute) ? attribute : null;
+  }
+
+  DIV.onclick = Prototype.emptyFunction;
+  var onclickValue = DIV.getAttribute('onclick');
+
+  var _getEv;
+
+  if (String(onclickValue).indexOf('{') > -1) {
+    _getEv = function(element, attribute) {
+      var value = element.getAttribute(attribute);
+      if (!value) return null;
+      value = value.toString();
+      value = value.split('{')[1];
+      value = value.split('}')[0];
+      return value.strip();
+    };
+  }
+  else if (onclickValue === '') {
+    _getEv = function(element, attribute) {
+      var value = element.getAttribute(attribute);
+      if (!value) return null;
+      return value.strip();
+    };
+  }
+
+  ATTRIBUTE_TRANSLATIONS.read = {
+    names: {
+      'class':     classProp,
+      'className': classProp,
+      'for':       forProp,
+      'htmlFor':   forProp
+    },
+
+    values: {
+      style: function(element) {
+        return element.style.cssText.toLowerCase();
+      },
+      title: function(element) {
+        return element.title;
+      }
+    }
+  };
+
+  ATTRIBUTE_TRANSLATIONS.write = {
+    names: {
+      className:   'class',
+      htmlFor:     'for',
+      cellpadding: 'cellPadding',
+      cellspacing: 'cellSpacing'
+    },
+
+    values: {
+      checked: function(element, value) {
+        element.checked = !!value;
+      },
+
+      style: function(element, value) {
+        element.style.cssText = value ? value : '';
+      }
+    }
+  };
+
+  ATTRIBUTE_TRANSLATIONS.has = { names: {} };
+
+  Object.extend(ATTRIBUTE_TRANSLATIONS.write.names,
+   ATTRIBUTE_TRANSLATIONS.read.names);
+
+  var CAMEL_CASED_ATTRIBUTE_NAMES = $w('colSpan rowSpan vAlign dateTime ' +
+   'accessKey tabIndex encType maxLength readOnly longDesc frameBorder');
+
+  for (var i = 0, attr; attr = CAMEL_CASED_ATTRIBUTE_NAMES[i]; i++) {
+    ATTRIBUTE_TRANSLATIONS.write.names[attr.toLowerCase()] = attr;
+    ATTRIBUTE_TRANSLATIONS.has.names[attr.toLowerCase()]   = attr;
+  }
+
+  Object.extend(ATTRIBUTE_TRANSLATIONS.read.values, {
+    href:        _getAttr2,
+    src:         _getAttr2,
+    type:        _getAttr,
+    action:      _getAttrNode,
+    disabled:    _getFlag,
+    checked:     _getFlag,
+    readonly:    _getFlag,
+    multiple:    _getFlag,
+    onload:      _getEv,
+    onunload:    _getEv,
+    onclick:     _getEv,
+    ondblclick:  _getEv,
+    onmousedown: _getEv,
+    onmouseup:   _getEv,
+    onmouseover: _getEv,
+    onmousemove: _getEv,
+    onmouseout:  _getEv,
+    onfocus:     _getEv,
+    onblur:      _getEv,
+    onkeypress:  _getEv,
+    onkeydown:   _getEv,
+    onkeyup:     _getEv,
+    onsubmit:    _getEv,
+    onreset:     _getEv,
+    onselect:    _getEv,
+    onchange:    _getEv
+  });
+
+
+  Object.extend(methods, {
+    identify:        identify,
+    readAttribute:   readAttribute,
+    writeAttribute:  writeAttribute,
+    classNames:      classNames,
+    hasClassName:    hasClassName,
+    addClassName:    addClassName,
+    removeClassName: removeClassName,
+    toggleClassName: toggleClassName
+  });
+
+
+  function normalizeStyleName(style) {
+    if (style === 'float' || style === 'styleFloat')
+      return 'cssFloat';
+    return style.camelize();
+  }
+
+  function normalizeStyleName_IE(style) {
+    if (style === 'float' || style === 'cssFloat')
+      return 'styleFloat';
+    return style.camelize();
+  }
+
+  function setStyle(element, styles) {
+    element = $(element);
+    var elementStyle = element.style, match;
+
+    if (Object.isString(styles)) {
+      elementStyle.cssText += ';' + styles;
+      if (styles.include('opacity')) {
+        var opacity = styles.match(/opacity:\s*(\d?\.?\d*)/)[1];
+        Element.setOpacity(element, opacity);
+      }
+      return element;
+    }
+
+    for (var property in styles) {
+      if (property === 'opacity') {
+        Element.setOpacity(element, styles[property]);
+      } else {
+        var value = styles[property];
+        if (property === 'float' || property === 'cssFloat') {
+          property = Object.isUndefined(elementStyle.styleFloat) ?
+           'cssFloat' : 'styleFloat';
+        }
+        elementStyle[property] = value;
+      }
+    }
+
+    return element;
+  }
+
+
+  function getStyle(element, style) {
+    element = $(element);
+    style = normalizeStyleName(style);
+
+    var value = element.style[style];
+    if (!value || value === 'auto') {
+      var css = document.defaultView.getComputedStyle(element, null);
+      value = css ? css[style] : null;
+    }
+
+    if (style === 'opacity') return value ? parseFloat(value) : 1.0;
+    return value === 'auto' ? null : value;
+  }
+
+  function getStyle_Opera(element, style) {
+    switch (style) {
+      case 'height': case 'width':
+        if (!Element.visible(element)) return null;
+
+        var dim = parseInt(getStyle(element, style), 10);
+
+        if (dim !== element['offset' + style.capitalize()])
+          return dim + 'px';
+
+        return Element.measure(element, style);
+
+      default: return getStyle(element, style);
+    }
+  }
+
+  function getStyle_IE(element, style) {
+    element = $(element);
+    style = normalizeStyleName_IE(style);
+
+    var value = element.style[style];
+    if (!value && element.currentStyle) {
+      value = element.currentStyle[style];
+    }
+
+    if (style === 'opacity' && !STANDARD_CSS_OPACITY_SUPPORTED)
+      return getOpacity_IE(element);
+
+    if (value === 'auto') {
+      if ((style === 'width' || style === 'height') && Element.visible(element))
+        return Element.measure(element, style) + 'px';
+      return null;
+    }
+
+    return value;
+  }
+
+  function stripAlphaFromFilter_IE(filter) {
+    return (filter || '').replace(/alpha\([^\)]*\)/gi, '');
+  }
+
+  function hasLayout_IE(element) {
+    if (!element.currentStyle.hasLayout)
+      element.style.zoom = 1;
+    return element;
+  }
+
+  var STANDARD_CSS_OPACITY_SUPPORTED = (function() {
+    DIV.style.cssText = "opacity:.55";
+    return /^0.55/.test(DIV.style.opacity);
+  })();
+
+  function setOpacity(element, value) {
+    element = $(element);
+    if (value == 1 || value === '') value = '';
+    else if (value < 0.00001) value = 0;
+    element.style.opacity = value;
+    return element;
+  }
+
+  function setOpacity_IE(element, value) {
+    if (STANDARD_CSS_OPACITY_SUPPORTED)
+      return setOpacity(element, value);
+
+    element = hasLayout_IE($(element));
+    var filter = Element.getStyle(element, 'filter'),
+     style = element.style;
+
+    if (value == 1 || value === '') {
+      filter = stripAlphaFromFilter_IE(filter);
+      if (filter) style.filter = filter;
+      else style.removeAttribute('filter');
+      return element;
+    }
+
+    if (value < 0.00001) value = 0;
+
+    style.filter = stripAlphaFromFilter_IE(filter) +
+     'alpha(opacity=' + (value * 100) + ')';
+
+    return element;
+  }
+
+
+  function getOpacity(element) {
+    return Element.getStyle(element, 'opacity');
+  }
+
+  function getOpacity_IE(element) {
+    if (STANDARD_CSS_OPACITY_SUPPORTED)
+      return getOpacity(element);
+
+    var filter = Element.getStyle(element, 'filter');
+    if (filter.length === 0) return 1.0;
+    var match = (filter || '').match(/alpha\(opacity=(.*)\)/);
+    if (match[1]) return parseFloat(match[1]) / 100;
+    return 1.0;
+  }
+
+
+  Object.extend(methods, {
+    setStyle:   setStyle,
+    getStyle:   getStyle,
+    setOpacity: setOpacity,
+    getOpacity: getOpacity
+  });
+
+  if ('styleFloat' in DIV.style) {
+    methods.getStyle = getStyle_IE;
+    methods.setOpacity = setOpacity_IE;
+    methods.getOpacity = getOpacity_IE;
+  }
+
+  var UID = 0;
+
+  GLOBAL.Element.Storage = { UID: 1 };
+
+  function getUniqueElementID(element) {
+    if (element === window) return 0;
+
+    if (typeof element._prototypeUID === 'undefined')
+      element._prototypeUID = Element.Storage.UID++;
+    return element._prototypeUID;
+  }
+
+  function getUniqueElementID_IE(element) {
+    if (element === window) return 0;
+    if (element == document) return 1;
+    return element.uniqueID;
+  }
+
+  var HAS_UNIQUE_ID_PROPERTY = ('uniqueID' in DIV);
+  if (HAS_UNIQUE_ID_PROPERTY)
+    getUniqueElementID = getUniqueElementID_IE;
+
+  function getStorage(element) {
+    if (!(element = $(element))) return;
+
+    var uid = getUniqueElementID(element);
+
+    if (!Element.Storage[uid])
+      Element.Storage[uid] = $H();
+
+    return Element.Storage[uid];
+  }
+
+  function store(element, key, value) {
+    if (!(element = $(element))) return;
+    var storage = getStorage(element);
+    if (arguments.length === 2) {
+      storage.update(key);
+    } else {
+      storage.set(key, value);
+    }
+    return element;
+  }
+
+  function retrieve(element, key, defaultValue) {
+    if (!(element = $(element))) return;
+    var storage = getStorage(element), value = storage.get(key);
+
+    if (Object.isUndefined(value)) {
+      storage.set(key, defaultValue);
+      value = defaultValue;
+    }
+
+    return value;
+  }
+
+
+  Object.extend(methods, {
+    getStorage: getStorage,
+    store:      store,
+    retrieve:   retrieve
+  });
+
+
+  var Methods = {}, ByTag = Element.Methods.ByTag,
+   F = Prototype.BrowserFeatures;
+
+  if (!F.ElementExtensions && ('__proto__' in DIV)) {
+    GLOBAL.HTMLElement = {};
+    GLOBAL.HTMLElement.prototype = DIV['__proto__'];
+    F.ElementExtensions = true;
+  }
+
+  function checkElementPrototypeDeficiency(tagName) {
+    if (typeof window.Element === 'undefined') return false;
+    var proto = window.Element.prototype;
+    if (proto) {
+      var id = '_' + (Math.random() + '').slice(2),
+       el = document.createElement(tagName);
+      proto[id] = 'x';
+      var isBuggy = (el[id] !== 'x');
+      delete proto[id];
+      el = null;
+      return isBuggy;
+    }
+
+    return false;
+  }
+
+  var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY =
+   checkElementPrototypeDeficiency('object');
+
+  function extendElementWith(element, methods) {
+    for (var property in methods) {
+      var value = methods[property];
+      if (Object.isFunction(value) && !(property in element))
+        element[property] = value.methodize();
+    }
+  }
+
+  var EXTENDED = {};
+  function elementIsExtended(element) {
+    var uid = getUniqueElementID(element);
+    return (uid in EXTENDED);
+  }
+
+  function extend(element) {
+    if (!element || elementIsExtended(element)) return element;
+    if (element.nodeType !== Node.ELEMENT_NODE || element == window)
+      return element;
+
+    var methods = Object.clone(Methods),
+     tagName = element.tagName.toUpperCase();
+
+    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
+
+    extendElementWith(element, methods);
+    EXTENDED[getUniqueElementID(element)] = true;
+    return element;
+  }
+
+  function extend_IE8(element) {
+    if (!element || elementIsExtended(element)) return element;
+
+    var t = element.tagName;
+    if (t && (/^(?:object|applet|embed)$/i.test(t))) {
+      extendElementWith(element, Element.Methods);
+      extendElementWith(element, Element.Methods.Simulated);
+      extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);
+    }
+
+    return element;
+  }
+
+  if (F.SpecificElementExtensions) {
+    extend = HTMLOBJECTELEMENT_PROTOTYPE_BUGGY ? extend_IE8 : Prototype.K;
+  }
+
+  function addMethodsToTagName(tagName, methods) {
+    tagName = tagName.toUpperCase();
+    if (!ByTag[tagName]) ByTag[tagName] = {};
+    Object.extend(ByTag[tagName], methods);
+  }
+
+  function mergeMethods(destination, methods, onlyIfAbsent) {
+    if (Object.isUndefined(onlyIfAbsent)) onlyIfAbsent = false;
+    for (var property in methods) {
+      var value = methods[property];
+      if (!Object.isFunction(value)) continue;
+      if (!onlyIfAbsent || !(property in destination))
+        destination[property] = value.methodize();
+    }
+  }
+
+  function findDOMClass(tagName) {
+    var klass;
+    var trans = {
+      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
+      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
+      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
+      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
+      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
+      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
+      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
+      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
+      "FrameSet", "IFRAME": "IFrame"
+    };
+    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
+    if (window[klass]) return window[klass];
+    klass = 'HTML' + tagName + 'Element';
+    if (window[klass]) return window[klass];
+    klass = 'HTML' + tagName.capitalize() + 'Element';
+    if (window[klass]) return window[klass];
+
+    var element = document.createElement(tagName),
+     proto = element['__proto__'] || element.constructor.prototype;
+
+    element = null;
+    return proto;
+  }
+
+  function addMethods(methods) {
+    if (arguments.length === 0) addFormMethods();
+
+    if (arguments.length === 2) {
+      var tagName = methods;
+      methods = arguments[1];
+    }
+
+    if (!tagName) {
+      Object.extend(Element.Methods, methods || {});
+    } else {
+      if (Object.isArray(tagName)) {
+        for (var i = 0, tag; tag = tagName[i]; i++)
+          addMethodsToTagName(tag, methods);
+      } else {
+        addMethodsToTagName(tagName, methods);
+      }
+    }
+
+    var ELEMENT_PROTOTYPE = window.HTMLElement ? HTMLElement.prototype :
+     Element.prototype;
+
+    if (F.ElementExtensions) {
+      mergeMethods(ELEMENT_PROTOTYPE, Element.Methods);
+      mergeMethods(ELEMENT_PROTOTYPE, Element.Methods.Simulated, true);
+    }
+
+    if (F.SpecificElementExtensions) {
+      for (var tag in Element.Methods.ByTag) {
+        var klass = findDOMClass(tag);
+        if (Object.isUndefined(klass)) continue;
+        mergeMethods(klass.prototype, ByTag[tag]);
+      }
+    }
+
+    Object.extend(Element, Element.Methods);
+    Object.extend(Element, Element.Methods.Simulated);
+    delete Element.ByTag;
+    delete Element.Simulated;
+
+    Element.extend.refresh();
+
+    ELEMENT_CACHE = {};
+  }
+
+  Object.extend(GLOBAL.Element, {
+    extend:     extend,
+    addMethods: addMethods
+  });
+
+  if (extend === Prototype.K) {
+    GLOBAL.Element.extend.refresh = Prototype.emptyFunction;
+  } else {
+    GLOBAL.Element.extend.refresh = function() {
+      if (Prototype.BrowserFeatures.ElementExtensions) return;
+      Object.extend(Methods, Element.Methods);
+      Object.extend(Methods, Element.Methods.Simulated);
+
+      EXTENDED = {};
+    };
+  }
+
+  function addFormMethods() {
+    Object.extend(Form, Form.Methods);
+    Object.extend(Form.Element, Form.Element.Methods);
+    Object.extend(Element.Methods.ByTag, {
+      "FORM":     Object.clone(Form.Methods),
+      "INPUT":    Object.clone(Form.Element.Methods),
+      "SELECT":   Object.clone(Form.Element.Methods),
+      "TEXTAREA": Object.clone(Form.Element.Methods),
+      "BUTTON":   Object.clone(Form.Element.Methods)
+    });
+  }
+
+  Element.addMethods(methods);
+
+})(this);
+(function() {
+
+  function toDecimal(pctString) {
+    var match = pctString.match(/^(\d+)%?$/i);
+    if (!match) return null;
+    return (Number(match[1]) / 100);
+  }
+
+  function getRawStyle(element, style) {
+    element = $(element);
+
+    var value = element.style[style];
+    if (!value || value === 'auto') {
+      var css = document.defaultView.getComputedStyle(element, null);
+      value = css ? css[style] : null;
+    }
+
+    if (style === 'opacity') return value ? parseFloat(value) : 1.0;
+    return value === 'auto' ? null : value;
+  }
+
+  function getRawStyle_IE(element, style) {
+    var value = element.style[style];
+    if (!value && element.currentStyle) {
+      value = element.currentStyle[style];
+    }
+    return value;
+  }
+
+  function getContentWidth(element, context) {
+    var boxWidth = element.offsetWidth;
+
+    var bl = getPixelValue(element, 'borderLeftWidth',  context) || 0;
+    var br = getPixelValue(element, 'borderRightWidth', context) || 0;
+    var pl = getPixelValue(element, 'paddingLeft',      context) || 0;
+    var pr = getPixelValue(element, 'paddingRight',     context) || 0;
+
+    return boxWidth - bl - br - pl - pr;
+  }
+
+  if ('currentStyle' in document.documentElement) {
+    getRawStyle = getRawStyle_IE;
+  }
+
+
+  function getPixelValue(value, property, context) {
+    var element = null;
+    if (Object.isElement(value)) {
+      element = value;
+      value = getRawStyle(element, property);
+    }
+
+    if (value === null || Object.isUndefined(value)) {
+      return null;
+    }
+
+    if ((/^(?:-)?\d+(\.\d+)?(px)?$/i).test(value)) {
+      return window.parseFloat(value);
+    }
+
+    var isPercentage = value.include('%'), isViewport = (context === document.viewport);
+
+    if (/\d/.test(value) && element && element.runtimeStyle && !(isPercentage && isViewport)) {
+      var style = element.style.left, rStyle = element.runtimeStyle.left;
+      element.runtimeStyle.left = element.currentStyle.left;
+      element.style.left = value || 0;
+      value = element.style.pixelLeft;
+      element.style.left = style;
+      element.runtimeStyle.left = rStyle;
+
+      return value;
+    }
+
+    if (element && isPercentage) {
+      context = context || element.parentNode;
+      var decimal = toDecimal(value), whole = null;
+
+      var isHorizontal = property.include('left') || property.include('right') ||
+       property.include('width');
+
+      var isVertical   = property.include('top') || property.include('bottom') ||
+        property.include('height');
+
+      if (context === document.viewport) {
+        if (isHorizontal) {
+          whole = document.viewport.getWidth();
+        } else if (isVertical) {
+          whole = document.viewport.getHeight();
+        }
+      } else {
+        if (isHorizontal) {
+          whole = $(context).measure('width');
+        } else if (isVertical) {
+          whole = $(context).measure('height');
+        }
+      }
+
+      return (whole === null) ? 0 : whole * decimal;
+    }
+
+    return 0;
+  }
+
+  function toCSSPixels(number) {
+    if (Object.isString(number) && number.endsWith('px'))
+      return number;
+    return number + 'px';
+  }
+
+  function isDisplayed(element) {
+    while (element && element.parentNode) {
+      var display = element.getStyle('display');
+      if (display === 'none') {
+        return false;
+      }
+      element = $(element.parentNode);
+    }
+    return true;
+  }
+
+  var hasLayout = Prototype.K;
+  if ('currentStyle' in document.documentElement) {
+    hasLayout = function(element) {
+      if (!element.currentStyle.hasLayout) {
+        element.style.zoom = 1;
+      }
+      return element;
+    };
+  }
+
+  function cssNameFor(key) {
+    if (key.include('border')) key = key + '-width';
+    return key.camelize();
+  }
+
+  Element.Layout = Class.create(Hash, {
+    initialize: function($super, element, preCompute) {
+      $super();
+      this.element = $(element);
+
+      Element.Layout.PROPERTIES.each( function(property) {
+        this._set(property, null);
+      }, this);
+
+      if (preCompute) {
+        this._preComputing = true;
+        this._begin();
+        Element.Layout.PROPERTIES.each( this._compute, this );
+        this._end();
+        this._preComputing = false;
+      }
+    },
+
+    _set: function(property, value) {
+      return Hash.prototype.set.call(this, property, value);
+    },
+
+    set: function(property, value) {
+      throw "Properties of Element.Layout are read-only.";
+    },
+
+    get: function($super, property) {
+      var value = $super(property);
+      return value === null ? this._compute(property) : value;
+    },
+
+    _begin: function() {
+      if (this._isPrepared()) return;
+
+      var element = this.element;
+      if (isDisplayed(element)) {
+        this._setPrepared(true);
+        return;
+      }
+
+
+      var originalStyles = {
+        position:   element.style.position   || '',
+        width:      element.style.width      || '',
+        visibility: element.style.visibility || '',
+        display:    element.style.display    || ''
+      };
+
+      element.store('prototype_original_styles', originalStyles);
+
+      var position = getRawStyle(element, 'position'), width = element.offsetWidth;
+
+      if (width === 0 || width === null) {
+        element.style.display = 'block';
+        width = element.offsetWidth;
+      }
+
+      var context = (position === 'fixed') ? document.viewport :
+       element.parentNode;
+
+      var tempStyles = {
+        visibility: 'hidden',
+        display:    'block'
+      };
+
+      if (position !== 'fixed') tempStyles.position = 'absolute';
+
+      element.setStyle(tempStyles);
+
+      var positionedWidth = element.offsetWidth, newWidth;
+      if (width && (positionedWidth === width)) {
+        newWidth = getContentWidth(element, context);
+      } else if (position === 'absolute' || position === 'fixed') {
+        newWidth = getContentWidth(element, context);
+      } else {
+        var parent = element.parentNode, pLayout = $(parent).getLayout();
+
+        newWidth = pLayout.get('width') -
+         this.get('margin-left') -
+         this.get('border-left') -
+         this.get('padding-left') -
+         this.get('padding-right') -
+         this.get('border-right') -
+         this.get('margin-right');
+      }
+
+      element.setStyle({ width: newWidth + 'px' });
+
+      this._setPrepared(true);
+    },
+
+    _end: function() {
+      var element = this.element;
+      var originalStyles = element.retrieve('prototype_original_styles');
+      element.store('prototype_original_styles', null);
+      element.setStyle(originalStyles);
+      this._setPrepared(false);
+    },
+
+    _compute: function(property) {
+      var COMPUTATIONS = Element.Layout.COMPUTATIONS;
+      if (!(property in COMPUTATIONS)) {
+        throw "Property not found.";
+      }
+
+      return this._set(property, COMPUTATIONS[property].call(this, this.element));
+    },
+
+    _isPrepared: function() {
+      return this.element.retrieve('prototype_element_layout_prepared', false);
+    },
+
+    _setPrepared: function(bool) {
+      return this.element.store('prototype_element_layout_prepared', bool);
+    },
+
+    toObject: function() {
+      var args = $A(arguments);
+      var keys = (args.length === 0) ? Element.Layout.PROPERTIES :
+       args.join(' ').split(' ');
+      var obj = {};
+      keys.each( function(key) {
+        if (!Element.Layout.PROPERTIES.include(key)) return;
+        var value = this.get(key);
+        if (value != null) obj[key] = value;
+      }, this);
+      return obj;
+    },
+
+    toHash: function() {
+      var obj = this.toObject.apply(this, arguments);
+      return new Hash(obj);
+    },
+
+    toCSS: function() {
+      var args = $A(arguments);
+      var keys = (args.length === 0) ? Element.Layout.PROPERTIES :
+       args.join(' ').split(' ');
+      var css = {};
+
+      keys.each( function(key) {
+        if (!Element.Layout.PROPERTIES.include(key)) return;
+        if (Element.Layout.COMPOSITE_PROPERTIES.include(key)) return;
+
+        var value = this.get(key);
+        if (value != null) css[cssNameFor(key)] = value + 'px';
+      }, this);
+      return css;
+    },
+
+    inspect: function() {
+      return "#<Element.Layout>";
+    }
+  });
+
+  Object.extend(Element.Layout, {
+    PROPERTIES: $w('height width top left right bottom border-left border-right border-top border-bottom padding-left padding-right padding-top padding-bottom margin-top margin-bottom margin-left margin-right padding-box-width padding-box-height border-box-width border-box-height margin-box-width margin-box-height'),
+
+    COMPOSITE_PROPERTIES: $w('padding-box-width padding-box-height margin-box-width margin-box-height border-box-width border-box-height'),
+
+    COMPUTATIONS: {
+      'height': function(element) {
+        if (!this._preComputing) this._begin();
+
+        var bHeight = this.get('border-box-height');
+        if (bHeight <= 0) {
+          if (!this._preComputing) this._end();
+          return 0;
+        }
+
+        var bTop = this.get('border-top'),
+         bBottom = this.get('border-bottom');
+
+        var pTop = this.get('padding-top'),
+         pBottom = this.get('padding-bottom');
+
+        if (!this._preComputing) this._end();
+
+        return bHeight - bTop - bBottom - pTop - pBottom;
+      },
+
+      'width': function(element) {
+        if (!this._preComputing) this._begin();
+
+        var bWidth = this.get('border-box-width');
+        if (bWidth <= 0) {
+          if (!this._preComputing) this._end();
+          return 0;
+        }
+
+        var bLeft = this.get('border-left'),
+         bRight = this.get('border-right');
+
+        var pLeft = this.get('padding-left'),
+         pRight = this.get('padding-right');
+
+        if (!this._preComputing) this._end();
+        return bWidth - bLeft - bRight - pLeft - pRight;
+      },
+
+      'padding-box-height': function(element) {
+        var height = this.get('height'),
+         pTop = this.get('padding-top'),
+         pBottom = this.get('padding-bottom');
+
+        return height + pTop + pBottom;
+      },
+
+      'padding-box-width': function(element) {
+        var width = this.get('width'),
+         pLeft = this.get('padding-left'),
+         pRight = this.get('padding-right');
+
+        return width + pLeft + pRight;
+      },
+
+      'border-box-height': function(element) {
+        if (!this._preComputing) this._begin();
+        var height = element.offsetHeight;
+        if (!this._preComputing) this._end();
+        return height;
+      },
+
+      'border-box-width': function(element) {
+        if (!this._preComputing) this._begin();
+        var width = element.offsetWidth;
+        if (!this._preComputing) this._end();
+        return width;
+      },
+
+      'margin-box-height': function(element) {
+        var bHeight = this.get('border-box-height'),
+         mTop = this.get('margin-top'),
+         mBottom = this.get('margin-bottom');
+
+        if (bHeight <= 0) return 0;
+
+        return bHeight + mTop + mBottom;
+      },
+
+      'margin-box-width': function(element) {
+        var bWidth = this.get('border-box-width'),
+         mLeft = this.get('margin-left'),
+         mRight = this.get('margin-right');
+
+        if (bWidth <= 0) return 0;
+
+        return bWidth + mLeft + mRight;
+      },
+
+      'top': function(element) {
+        var offset = element.positionedOffset();
+        return offset.top;
+      },
+
+      'bottom': function(element) {
+        var offset = element.positionedOffset(),
+         parent = element.getOffsetParent(),
+         pHeight = parent.measure('height');
+
+        var mHeight = this.get('border-box-height');
+
+        return pHeight - mHeight - offset.top;
+      },
+
+      'left': function(element) {
+        var offset = element.positionedOffset();
+        return offset.left;
+      },
+
+      'right': function(element) {
+        var offset = element.positionedOffset(),
+         parent = element.getOffsetParent(),
+         pWidth = parent.measure('width');
+
+        var mWidth = this.get('border-box-width');
+
+        return pWidth - mWidth - offset.left;
+      },
+
+      'padding-top': function(element) {
+        return getPixelValue(element, 'paddingTop');
+      },
+
+      'padding-bottom': function(element) {
+        return getPixelValue(element, 'paddingBottom');
+      },
+
+      'padding-left': function(element) {
+        return getPixelValue(element, 'paddingLeft');
+      },
+
+      'padding-right': function(element) {
+        return getPixelValue(element, 'paddingRight');
+      },
+
+      'border-top': function(element) {
+        return getPixelValue(element, 'borderTopWidth');
+      },
+
+      'border-bottom': function(element) {
+        return getPixelValue(element, 'borderBottomWidth');
+      },
+
+      'border-left': function(element) {
+        return getPixelValue(element, 'borderLeftWidth');
+      },
+
+      'border-right': function(element) {
+        return getPixelValue(element, 'borderRightWidth');
+      },
+
+      'margin-top': function(element) {
+        return getPixelValue(element, 'marginTop');
+      },
+
+      'margin-bottom': function(element) {
+        return getPixelValue(element, 'marginBottom');
+      },
+
+      'margin-left': function(element) {
+        return getPixelValue(element, 'marginLeft');
+      },
+
+      'margin-right': function(element) {
+        return getPixelValue(element, 'marginRight');
+      }
+    }
+  });
+
+  if ('getBoundingClientRect' in document.documentElement) {
+    Object.extend(Element.Layout.COMPUTATIONS, {
+      'right': function(element) {
+        var parent = hasLayout(element.getOffsetParent());
+        var rect = element.getBoundingClientRect(),
+         pRect = parent.getBoundingClientRect();
+
+        return (pRect.right - rect.right).round();
+      },
+
+      'bottom': function(element) {
+        var parent = hasLayout(element.getOffsetParent());
+        var rect = element.getBoundingClientRect(),
+         pRect = parent.getBoundingClientRect();
+
+        return (pRect.bottom - rect.bottom).round();
+      }
+    });
+  }
+
+  Element.Offset = Class.create({
+    initialize: function(left, top) {
+      this.left = left.round();
+      this.top  = top.round();
+
+      this[0] = this.left;
+      this[1] = this.top;
+    },
+
+    relativeTo: function(offset) {
+      return new Element.Offset(
+        this.left - offset.left,
+        this.top  - offset.top
+      );
+    },
+
+    inspect: function() {
+      return "#<Element.Offset left: #{left} top: #{top}>".interpolate(this);
+    },
+
+    toString: function() {
+      return "[#{left}, #{top}]".interpolate(this);
+    },
+
+    toArray: function() {
+      return [this.left, this.top];
+    }
+  });
+
+  function getLayout(element, preCompute) {
+    return new Element.Layout(element, preCompute);
+  }
+
+  function measure(element, property) {
+    return $(element).getLayout().get(property);
+  }
+
+  function getHeight(element) {
+    return Element.getDimensions(element).height;
+  }
+
+  function getWidth(element) {
+    return Element.getDimensions(element).width;
+  }
+
+  function getDimensions(element) {
+    element = $(element);
+    var display = Element.getStyle(element, 'display');
+
+    if (display && display !== 'none') {
+      return { width: element.offsetWidth, height: element.offsetHeight };
+    }
+
+    var style = element.style;
+    var originalStyles = {
+      visibility: style.visibility,
+      position:   style.position,
+      display:    style.display
+    };
+
+    var newStyles = {
+      visibility: 'hidden',
+      display:    'block'
+    };
+
+    if (originalStyles.position !== 'fixed')
+      newStyles.position = 'absolute';
+
+    Element.setStyle(element, newStyles);
+
+    var dimensions = {
+      width:  element.offsetWidth,
+      height: element.offsetHeight
+    };
+
+    Element.setStyle(element, originalStyles);
+
+    return dimensions;
+  }
+
+  function getOffsetParent(element) {
+    element = $(element);
+
+    if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))
+      return $(document.body);
+
+    var isInline = (Element.getStyle(element, 'display') === 'inline');
+    if (!isInline && element.offsetParent) return $(element.offsetParent);
+
+    while ((element = element.parentNode) && element !== document.body) {
+      if (Element.getStyle(element, 'position') !== 'static') {
+        return isHtml(element) ? $(document.body) : $(element);
+      }
+    }
+
+    return $(document.body);
+  }
+
+
+  function cumulativeOffset(element) {
+    element = $(element);
+    var valueT = 0, valueL = 0;
+    if (element.parentNode) {
+      do {
+        valueT += element.offsetTop  || 0;
+        valueL += element.offsetLeft || 0;
+        element = element.offsetParent;
+      } while (element);
+    }
+    return new Element.Offset(valueL, valueT);
+  }
+
+  function positionedOffset(element) {
+    element = $(element);
+
+    var layout = element.getLayout();
+
+    var valueT = 0, valueL = 0;
+    do {
+      valueT += element.offsetTop  || 0;
+      valueL += element.offsetLeft || 0;
+      element = element.offsetParent;
+      if (element) {
+        if (isBody(element)) break;
+        var p = Element.getStyle(element, 'position');
+        if (p !== 'static') break;
+      }
+    } while (element);
+
+    valueL -= layout.get('margin-top');
+    valueT -= layout.get('margin-left');
+
+    return new Element.Offset(valueL, valueT);
+  }
+
+  function cumulativeScrollOffset(element) {
+    var valueT = 0, valueL = 0;
+    do {
+      valueT += element.scrollTop  || 0;
+      valueL += element.scrollLeft || 0;
+      element = element.parentNode;
+    } while (element);
+    return new Element.Offset(valueL, valueT);
+  }
+
+  function viewportOffset(forElement) {
+    var valueT = 0, valueL = 0, docBody = document.body;
+
+    var element = $(forElement);
+    do {
+      valueT += element.offsetTop  || 0;
+      valueL += element.offsetLeft || 0;
+      if (element.offsetParent == docBody &&
+        Element.getStyle(element, 'position') == 'absolute') break;
+    } while (element = element.offsetParent);
+
+    element = forElement;
+    do {
+      if (element != docBody) {
+        valueT -= element.scrollTop  || 0;
+        valueL -= element.scrollLeft || 0;
+      }
+    } while (element = element.parentNode);
+    return new Element.Offset(valueL, valueT);
+  }
+
+  function absolutize(element) {
+    element = $(element);
+
+    if (Element.getStyle(element, 'position') === 'absolute') {
+      return element;
+    }
+
+    var offsetParent = getOffsetParent(element);
+    var eOffset = element.viewportOffset(),
+     pOffset = offsetParent.viewportOffset();
+
+    var offset = eOffset.relativeTo(pOffset);
+    var layout = element.getLayout();
+
+    element.store('prototype_absolutize_original_styles', {
+      left:   element.getStyle('left'),
+      top:    element.getStyle('top'),
+      width:  element.getStyle('width'),
+      height: element.getStyle('height')
+    });
+
+    element.setStyle({
+      position: 'absolute',
+      top:    offset.top + 'px',
+      left:   offset.left + 'px',
+      width:  layout.get('width') + 'px',
+      height: layout.get('height') + 'px'
+    });
+
+    return element;
+  }
+
+  function relativize(element) {
+    element = $(element);
+    if (Element.getStyle(element, 'position') === 'relative') {
+      return element;
+    }
+
+    var originalStyles =
+     element.retrieve('prototype_absolutize_original_styles');
+
+    if (originalStyles) element.setStyle(originalStyles);
+    return element;
+  }
+
+
+  function scrollTo(element) {
+    element = $(element);
+    var pos = Element.cumulativeOffset(element);
+    window.scrollTo(pos.left, pos.top);
+    return element;
+  }
+
+
+  function makePositioned(element) {
+    element = $(element);
+    var position = Element.getStyle(element, 'position'), styles = {};
+    if (position === 'static' || !position) {
+      styles.position = 'relative';
+      if (Prototype.Browser.Opera) {
+        styles.top  = 0;
+        styles.left = 0;
+      }
+      Element.setStyle(element, styles);
+      Element.store(element, 'prototype_made_positioned', true);
+    }
+    return element;
+  }
+
+  function undoPositioned(element) {
+    element = $(element);
+    var storage = Element.getStorage(element),
+     madePositioned = storage.get('prototype_made_positioned');
+
+    if (madePositioned) {
+      storage.unset('prototype_made_positioned');
+      Element.setStyle(element, {
+        position: '',
+        top:      '',
+        bottom:   '',
+        left:     '',
+        right:    ''
+      });
+    }
+    return element;
+  }
+
+  function makeClipping(element) {
+    element = $(element);
+
+    var storage = Element.getStorage(element),
+     madeClipping = storage.get('prototype_made_clipping');
+
+    if (Object.isUndefined(madeClipping)) {
+      var overflow = Element.getStyle(element, 'overflow');
+      storage.set('prototype_made_clipping', overflow);
+      if (overflow !== 'hidden')
+        element.style.overflow = 'hidden';
+    }
+
+    return element;
+  }
+
+  function undoClipping(element) {
+    element = $(element);
+    var storage = Element.getStorage(element),
+     overflow = storage.get('prototype_made_clipping');
+
+    if (!Object.isUndefined(overflow)) {
+      storage.unset('prototype_made_clipping');
+      element.style.overflow = overflow || '';
+    }
+
+    return element;
+  }
+
+  function clonePosition(element, source, options) {
+    options = Object.extend({
+      setLeft:    true,
+      setTop:     true,
+      setWidth:   true,
+      setHeight:  true,
+      offsetTop:  0,
+      offsetLeft: 0
+    }, options || {});
+
+    source  = $(source);
+    element = $(element);
+    var p, delta, layout, styles = {};
+
+    if (options.setLeft || options.setTop) {
+      p = Element.viewportOffset(source);
+      delta = [0, 0];
+      if (Element.getStyle(element, 'position') === 'absolute') {
+        var parent = Element.getOffsetParent(element);
+        if (parent !== document.body) delta = Element.viewportOffset(parent);
+      }
+    }
+
+    if (options.setWidth || options.setHeight) {
+      layout = Element.getLayout(source);
+    }
+
+    if (options.setLeft)
+      styles.left = (p[0] - delta[0] + options.offsetLeft) + 'px';
+    if (options.setTop)
+      styles.top  = (p[1] - delta[1] + options.offsetTop)  + 'px';
+
+    if (options.setWidth)
+      styles.width  = layout.get('border-box-width')  + 'px';
+    if (options.setHeight)
+      styles.height = layout.get('border-box-height') + 'px';
+
+    return Element.setStyle(element, styles);
+  }
+
+
+  if (Prototype.Browser.IE) {
+    getOffsetParent = getOffsetParent.wrap(
+      function(proceed, element) {
+        element = $(element);
+
+        if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))
+          return $(document.body);
+
+        var position = element.getStyle('position');
+        if (position !== 'static') return proceed(element);
+
+        element.setStyle({ position: 'relative' });
+        var value = proceed(element);
+        element.setStyle({ position: position });
+        return value;
+      }
+    );
+
+    positionedOffset = positionedOffset.wrap(function(proceed, element) {
+      element = $(element);
+      if (!element.parentNode) return new Element.Offset(0, 0);
+      var position = element.getStyle('position');
+      if (position !== 'static') return proceed(element);
+
+      var offsetParent = element.getOffsetParent();
+      if (offsetParent && offsetParent.getStyle('position') === 'fixed')
+        hasLayout(offsetParent);
+
+      element.setStyle({ position: 'relative' });
+      var value = proceed(element);
+      element.setStyle({ position: position });
+      return value;
+    });
+  } else if (Prototype.Browser.Webkit) {
+    cumulativeOffset = function(element) {
+      element = $(element);
+      var valueT = 0, valueL = 0;
+      do {
+        valueT += element.offsetTop  || 0;
+        valueL += element.offsetLeft || 0;
+        if (element.offsetParent == document.body) {
+          if (Element.getStyle(element, 'position') == 'absolute') break;
+        }
+
+        element = element.offsetParent;
+      } while (element);
+
+      return new Element.Offset(valueL, valueT);
+    };
+  }
+
+
+  Element.addMethods({
+    getLayout:              getLayout,
+    measure:                measure,
+    getWidth:               getWidth,
+    getHeight:              getHeight,
+    getDimensions:          getDimensions,
+    getOffsetParent:        getOffsetParent,
+    cumulativeOffset:       cumulativeOffset,
+    positionedOffset:       positionedOffset,
+    cumulativeScrollOffset: cumulativeScrollOffset,
+    viewportOffset:         viewportOffset,
+    absolutize:             absolutize,
+    relativize:             relativize,
+    scrollTo:               scrollTo,
+    makePositioned:         makePositioned,
+    undoPositioned:         undoPositioned,
+    makeClipping:           makeClipping,
+    undoClipping:           undoClipping,
+    clonePosition:          clonePosition
+  });
+
+  function isBody(element) {
+    return element.nodeName.toUpperCase() === 'BODY';
+  }
+
+  function isHtml(element) {
+    return element.nodeName.toUpperCase() === 'HTML';
+  }
+
+  function isDocument(element) {
+    return element.nodeType === Node.DOCUMENT_NODE;
+  }
+
+  function isDetached(element) {
+    return element !== document.body &&
+     !Element.descendantOf(element, document.body);
+  }
+
+  if ('getBoundingClientRect' in document.documentElement) {
+    Element.addMethods({
+      viewportOffset: function(element) {
+        element = $(element);
+        if (isDetached(element)) return new Element.Offset(0, 0);
+
+        var rect = element.getBoundingClientRect(),
+         docEl = document.documentElement;
+        return new Element.Offset(rect.left - docEl.clientLeft,
+         rect.top - docEl.clientTop);
+      }
+    });
+  }
+
+
+})();
+
+(function() {
+
+  var IS_OLD_OPERA = Prototype.Browser.Opera &&
+   (window.parseFloat(window.opera.version()) < 9.5);
+  var ROOT = null;
+  function getRootElement() {
+    if (ROOT) return ROOT;
+    ROOT = IS_OLD_OPERA ? document.body : document.documentElement;
+    return ROOT;
+  }
+
+  function getDimensions() {
+    return { width: this.getWidth(), height: this.getHeight() };
+  }
+
+  function getWidth() {
+    return getRootElement().clientWidth;
+  }
+
+  function getHeight() {
+    return getRootElement().clientHeight;
+  }
+
+  function getScrollOffsets() {
+    var x = window.pageXOffset || document.documentElement.scrollLeft ||
+     document.body.scrollLeft;
+    var y = window.pageYOffset || document.documentElement.scrollTop ||
+     document.body.scrollTop;
+
+    return new Element.Offset(x, y);
+  }
+
+  document.viewport = {
+    getDimensions:    getDimensions,
+    getWidth:         getWidth,
+    getHeight:        getHeight,
+    getScrollOffsets: getScrollOffsets
+  };
+
+})();
+window.$$ = function() {
+  var expression = $A(arguments).join(', ');
+  return Prototype.Selector.select(expression, document);
+};
+
+Prototype.Selector = (function() {
+
+  function select() {
+    throw new Error('Method "Prototype.Selector.select" must be defined.');
+  }
+
+  function match() {
+    throw new Error('Method "Prototype.Selector.match" must be defined.');
+  }
+
+  function find(elements, expression, index) {
+    index = index || 0;
+    var match = Prototype.Selector.match, length = elements.length, matchIndex = 0, i;
+
+    for (i = 0; i < length; i++) {
+      if (match(elements[i], expression) && index == matchIndex++) {
+        return Element.extend(elements[i]);
+      }
+    }
+  }
+
+  function extendElements(elements) {
+    for (var i = 0, length = elements.length; i < length; i++) {
+      Element.extend(elements[i]);
+    }
+    return elements;
+  }
+
+
+  var K = Prototype.K;
+
+  return {
+    select: select,
+    match: match,
+    find: find,
+    extendElements: (Element.extend === K) ? K : extendElements,
+    extendElement: Element.extend
+  };
+})();
+/*!
+ * Sizzle CSS Selector Engine
+ *  Copyright 2011, The Dojo Foundation
+ *  Released under the MIT, BSD, and GPL Licenses.
+ *  More information: http://sizzlejs.com/
+ */
+(function(){
+
+var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^\[\]]*\]|['"][^'"]*['"]|[^\[\]'"]+)+\]|\\.|[^ >+~,(\[\\]+)+|[>+~])(\s*,\s*)?((?:.|\r|\n)*)/g,
+	done = 0,
+	toString = Object.prototype.toString,
+	hasDuplicate = false,
+	baseHasDuplicate = true,
+	rBackslash = /\\/g,
+	rNonWord = /\W/;
+
+[0, 0].sort(function() {
+	baseHasDuplicate = false;
+	return 0;
+});
+
+var Sizzle = function( selector, context, results, seed ) {
+	results = results || [];
+	context = context || document;
+
+	var origContext = context;
+
+	if ( context.nodeType !== 1 && context.nodeType !== 9 ) {
+		return [];
+	}
+
+	if ( !selector || typeof selector !== "string" ) {
+		return results;
+	}
+
+	var m, set, checkSet, extra, ret, cur, pop, i,
+		prune = true,
+		contextXML = Sizzle.isXML( context ),
+		parts = [],
+		soFar = selector;
+
+	do {
+		chunker.exec( "" );
+		m = chunker.exec( soFar );
+
+		if ( m ) {
+			soFar = m[3];
+
+			parts.push( m[1] );
+
+			if ( m[2] ) {
+				extra = m[3];
+				break;
+			}
+		}
+	} while ( m );
+
+	if ( parts.length > 1 && origPOS.exec( selector ) ) {
+
+		if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
+			set = posProcess( parts[0] + parts[1], context );
+
+		} else {
+			set = Expr.relative[ parts[0] ] ?
+				[ context ] :
+				Sizzle( parts.shift(), context );
+
+			while ( parts.length ) {
+				selector = parts.shift();
+
+				if ( Expr.relative[ selector ] ) {
+					selector += parts.shift();
+				}
+
+				set = posProcess( selector, set );
+			}
+		}
+
+	} else {
+		if ( !seed && parts.length > 1 && context.nodeType === 9 && !contextXML &&
+				Expr.match.ID.test(parts[0]) && !Expr.match.ID.test(parts[parts.length - 1]) ) {
+
+			ret = Sizzle.find( parts.shift(), context, contextXML );
+			context = ret.expr ?
+				Sizzle.filter( ret.expr, ret.set )[0] :
+				ret.set[0];
+		}
+
+		if ( context ) {
+			ret = seed ?
+				{ expr: parts.pop(), set: makeArray(seed) } :
+				Sizzle.find( parts.pop(), parts.length === 1 && (parts[0] === "~" || parts[0] === "+") && context.parentNode ? context.parentNode : context, contextXML );
+
+			set = ret.expr ?
+				Sizzle.filter( ret.expr, ret.set ) :
+				ret.set;
+
+			if ( parts.length > 0 ) {
+				checkSet = makeArray( set );
+
+			} else {
+				prune = false;
+			}
+
+			while ( parts.length ) {
+				cur = parts.pop();
+				pop = cur;
+
+				if ( !Expr.relative[ cur ] ) {
+					cur = "";
+				} else {
+					pop = parts.pop();
+				}
+
+				if ( pop == null ) {
+					pop = context;
+				}
+
+				Expr.relative[ cur ]( checkSet, pop, contextXML );
+			}
+
+		} else {
+			checkSet = parts = [];
+		}
+	}
+
+	if ( !checkSet ) {
+		checkSet = set;
+	}
+
+	if ( !checkSet ) {
+		Sizzle.error( cur || selector );
+	}
+
+	if ( toString.call(checkSet) === "[object Array]" ) {
+		if ( !prune ) {
+			results.push.apply( results, checkSet );
+
+		} else if ( context && context.nodeType === 1 ) {
+			for ( i = 0; checkSet[i] != null; i++ ) {
+				if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && Sizzle.contains(context, checkSet[i])) ) {
+					results.push( set[i] );
+				}
+			}
+
+		} else {
+			for ( i = 0; checkSet[i] != null; i++ ) {
+				if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
+					results.push( set[i] );
+				}
+			}
+		}
+
+	} else {
+		makeArray( checkSet, results );
+	}
+
+	if ( extra ) {
+		Sizzle( extra, origContext, results, seed );
+		Sizzle.uniqueSort( results );
+	}
+
+	return results;
+};
+
+Sizzle.uniqueSort = function( results ) {
+	if ( sortOrder ) {
+		hasDuplicate = baseHasDuplicate;
+		results.sort( sortOrder );
+
+		if ( hasDuplicate ) {
+			for ( var i = 1; i < results.length; i++ ) {
+				if ( results[i] === results[ i - 1 ] ) {
+					results.splice( i--, 1 );
+				}
+			}
+		}
+	}
+
+	return results;
+};
+
+Sizzle.matches = function( expr, set ) {
+	return Sizzle( expr, null, null, set );
+};
+
+Sizzle.matchesSelector = function( node, expr ) {
+	return Sizzle( expr, null, null, [node] ).length > 0;
+};
+
+Sizzle.find = function( expr, context, isXML ) {
+	var set;
+
+	if ( !expr ) {
+		return [];
+	}
+
+	for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
+		var match,
+			type = Expr.order[i];
+
+		if ( (match = Expr.leftMatch[ type ].exec( expr )) ) {
+			var left = match[1];
+			match.splice( 1, 1 );
+
+			if ( left.substr( left.length - 1 ) !== "\\" ) {
+				match[1] = (match[1] || "").replace( rBackslash, "" );
+				set = Expr.find[ type ]( match, context, isXML );
+
+				if ( set != null ) {
+					expr = expr.replace( Expr.match[ type ], "" );
+					break;
+				}
+			}
+		}
+	}
+
+	if ( !set ) {
+		set = typeof context.getElementsByTagName !== "undefined" ?
+			context.getElementsByTagName( "*" ) :
+			[];
+	}
+
+	return { set: set, expr: expr };
+};
+
+Sizzle.filter = function( expr, set, inplace, not ) {
+	var match, anyFound,
+		old = expr,
+		result = [],
+		curLoop = set,
+		isXMLFilter = set && set[0] && Sizzle.isXML( set[0] );
+
+	while ( expr && set.length ) {
+		for ( var type in Expr.filter ) {
+			if ( (match = Expr.leftMatch[ type ].exec( expr )) != null && match[2] ) {
+				var found, item,
+					filter = Expr.filter[ type ],
+					left = match[1];
+
+				anyFound = false;
+
+				match.splice(1,1);
+
+				if ( left.substr( left.length - 1 ) === "\\" ) {
+					continue;
+				}
+
+				if ( curLoop === result ) {
+					result = [];
+				}
+
+				if ( Expr.preFilter[ type ] ) {
+					match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not, isXMLFilter );
+
+					if ( !match ) {
+						anyFound = found = true;
+
+					} else if ( match === true ) {
+						continue;
+					}
+				}
+
+				if ( match ) {
+					for ( var i = 0; (item = curLoop[i]) != null; i++ ) {
+						if ( item ) {
+							found = filter( item, match, i, curLoop );
+							var pass = not ^ !!found;
+
+							if ( inplace && found != null ) {
+								if ( pass ) {
+									anyFound = true;
+
+								} else {
+									curLoop[i] = false;
+								}
+
+							} else if ( pass ) {
+								result.push( item );
+								anyFound = true;
+							}
+						}
+					}
+				}
+
+				if ( found !== undefined ) {
+					if ( !inplace ) {
+						curLoop = result;
+					}
+
+					expr = expr.replace( Expr.match[ type ], "" );
+
+					if ( !anyFound ) {
+						return [];
+					}
+
+					break;
+				}
+			}
+		}
+
+		if ( expr === old ) {
+			if ( anyFound == null ) {
+				Sizzle.error( expr );
+
+			} else {
+				break;
+			}
+		}
+
+		old = expr;
+	}
+
+	return curLoop;
+};
+
+Sizzle.error = function( msg ) {
+	throw "Syntax error, unrecognized expression: " + msg;
+};
+
+var Expr = Sizzle.selectors = {
+	order: [ "ID", "NAME", "TAG" ],
+
+	match: {
+		ID: /#((?:[\w\u00c0-\uFFFF\-]|\\.)+)/,
+		CLASS: /\.((?:[\w\u00c0-\uFFFF\-]|\\.)+)/,
+		NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF\-]|\\.)+)['"]*\]/,
+		ATTR: /\[\s*((?:[\w\u00c0-\uFFFF\-]|\\.)+)\s*(?:(\S?=)\s*(?:(['"])(.*?)\3|(#?(?:[\w\u00c0-\uFFFF\-]|\\.)*)|)|)\s*\]/,
+		TAG: /^((?:[\w\u00c0-\uFFFF\*\-]|\\.)+)/,
+		CHILD: /:(only|nth|last|first)-child(?:\(\s*(even|odd|(?:[+\-]?\d+|(?:[+\-]?\d*)?n\s*(?:[+\-]\s*\d+)?))\s*\))?/,
+		POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^\-]|$)/,
+		PSEUDO: /:((?:[\w\u00c0-\uFFFF\-]|\\.)+)(?:\((['"]?)((?:\([^\)]+\)|[^\(\)]*)+)\2\))?/
+	},
+
+	leftMatch: {},
+
+	attrMap: {
+		"class": "className",
+		"for": "htmlFor"
+	},
+
+	attrHandle: {
+		href: function( elem ) {
+			return elem.getAttribute( "href" );
+		},
+		type: function( elem ) {
+			return elem.getAttribute( "type" );
+		}
+	},
+
+	relative: {
+		"+": function(checkSet, part){
+			var isPartStr = typeof part === "string",
+				isTag = isPartStr && !rNonWord.test( part ),
+				isPartStrNotTag = isPartStr && !isTag;
+
+			if ( isTag ) {
+				part = part.toLowerCase();
+			}
+
+			for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {
+				if ( (elem = checkSet[i]) ) {
+					while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {}
+
+					checkSet[i] = isPartStrNotTag || elem && elem.nodeName.toLowerCase() === part ?
+						elem || false :
+						elem === part;
+				}
+			}
+
+			if ( isPartStrNotTag ) {
+				Sizzle.filter( part, checkSet, true );
+			}
+		},
+
+		">": function( checkSet, part ) {
+			var elem,
+				isPartStr = typeof part === "string",
+				i = 0,
+				l = checkSet.length;
+
+			if ( isPartStr && !rNonWord.test( part ) ) {
+				part = part.toLowerCase();
+
+				for ( ; i < l; i++ ) {
+					elem = checkSet[i];
+
+					if ( elem ) {
+						var parent = elem.parentNode;
+						checkSet[i] = parent.nodeName.toLowerCase() === part ? parent : false;
+					}
+				}
+
+			} else {
+				for ( ; i < l; i++ ) {
+					elem = checkSet[i];
+
+					if ( elem ) {
+						checkSet[i] = isPartStr ?
+							elem.parentNode :
+							elem.parentNode === part;
+					}
+				}
+
+				if ( isPartStr ) {
+					Sizzle.filter( part, checkSet, true );
+				}
+			}
+		},
+
+		"": function(checkSet, part, isXML){
+			var nodeCheck,
+				doneName = done++,
+				checkFn = dirCheck;
+
+			if ( typeof part === "string" && !rNonWord.test( part ) ) {
+				part = part.toLowerCase();
+				nodeCheck = part;
+				checkFn = dirNodeCheck;
+			}
+
+			checkFn( "parentNode", part, doneName, checkSet, nodeCheck, isXML );
+		},
+
+		"~": function( checkSet, part, isXML ) {
+			var nodeCheck,
+				doneName = done++,
+				checkFn = dirCheck;
+
+			if ( typeof part === "string" && !rNonWord.test( part ) ) {
+				part = part.toLowerCase();
+				nodeCheck = part;
+				checkFn = dirNodeCheck;
+			}
+
+			checkFn( "previousSibling", part, doneName, checkSet, nodeCheck, isXML );
+		}
+	},
+
+	find: {
+		ID: function( match, context, isXML ) {
+			if ( typeof context.getElementById !== "undefined" && !isXML ) {
+				var m = context.getElementById(match[1]);
+				return m && m.parentNode ? [m] : [];
+			}
+		},
+
+		NAME: function( match, context ) {
+			if ( typeof context.getElementsByName !== "undefined" ) {
+				var ret = [],
+					results = context.getElementsByName( match[1] );
+
+				for ( var i = 0, l = results.length; i < l; i++ ) {
+					if ( results[i].getAttribute("name") === match[1] ) {
+						ret.push( results[i] );
+					}
+				}
+
+				return ret.length === 0 ? null : ret;
+			}
+		},
+
+		TAG: function( match, context ) {
+			if ( typeof context.getElementsByTagName !== "undefined" ) {
+				return context.getElementsByTagName( match[1] );
+			}
+		}
+	},
+	preFilter: {
+		CLASS: function( match, curLoop, inplace, result, not, isXML ) {
+			match = " " + match[1].replace( rBackslash, "" ) + " ";
+
+			if ( isXML ) {
+				return match;
+			}
+
+			for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {
+				if ( elem ) {
+					if ( not ^ (elem.className && (" " + elem.className + " ").replace(/[\t\n\r]/g, " ").indexOf(match) >= 0) ) {
+						if ( !inplace ) {
+							result.push( elem );
+						}
+
+					} else if ( inplace ) {
+						curLoop[i] = false;
+					}
+				}
+			}
+
+			return false;
+		},
+
+		ID: function( match ) {
+			return match[1].replace( rBackslash, "" );
+		},
+
+		TAG: function( match, curLoop ) {
+			return match[1].replace( rBackslash, "" ).toLowerCase();
+		},
+
+		CHILD: function( match ) {
+			if ( match[1] === "nth" ) {
+				if ( !match[2] ) {
+					Sizzle.error( match[0] );
+				}
+
+				match[2] = match[2].replace(/^\+|\s*/g, '');
+
+				var test = /(-?)(\d*)(?:n([+\-]?\d*))?/.exec(
+					match[2] === "even" && "2n" || match[2] === "odd" && "2n+1" ||
+					!/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
+
+				match[2] = (test[1] + (test[2] || 1)) - 0;
+				match[3] = test[3] - 0;
+			}
+			else if ( match[2] ) {
+				Sizzle.error( match[0] );
+			}
+
+			match[0] = done++;
+
+			return match;
+		},
+
+		ATTR: function( match, curLoop, inplace, result, not, isXML ) {
+			var name = match[1] = match[1].replace( rBackslash, "" );
+
+			if ( !isXML && Expr.attrMap[name] ) {
+				match[1] = Expr.attrMap[name];
+			}
+
+			match[4] = ( match[4] || match[5] || "" ).replace( rBackslash, "" );
+
+			if ( match[2] === "~=" ) {
+				match[4] = " " + match[4] + " ";
+			}
+
+			return match;
+		},
+
+		PSEUDO: function( match, curLoop, inplace, result, not ) {
+			if ( match[1] === "not" ) {
+				if ( ( chunker.exec(match[3]) || "" ).length > 1 || /^\w/.test(match[3]) ) {
+					match[3] = Sizzle(match[3], null, null, curLoop);
+
+				} else {
+					var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
+
+					if ( !inplace ) {
+						result.push.apply( result, ret );
+					}
+
+					return false;
+				}
+
+			} else if ( Expr.match.POS.test( match[0] ) || Expr.match.CHILD.test( match[0] ) ) {
+				return true;
+			}
+
+			return match;
+		},
+
+		POS: function( match ) {
+			match.unshift( true );
+
+			return match;
+		}
+	},
+
+	filters: {
+		enabled: function( elem ) {
+			return elem.disabled === false && elem.type !== "hidden";
+		},
+
+		disabled: function( elem ) {
+			return elem.disabled === true;
+		},
+
+		checked: function( elem ) {
+			return elem.checked === true;
+		},
+
+		selected: function( elem ) {
+			if ( elem.parentNode ) {
+				elem.parentNode.selectedIndex;
+			}
+
+			return elem.selected === true;
+		},
+
+		parent: function( elem ) {
+			return !!elem.firstChild;
+		},
+
+		empty: function( elem ) {
+			return !elem.firstChild;
+		},
+
+		has: function( elem, i, match ) {
+			return !!Sizzle( match[3], elem ).length;
+		},
+
+		header: function( elem ) {
+			return (/h\d/i).test( elem.nodeName );
+		},
+
+		text: function( elem ) {
+			var attr = elem.getAttribute( "type" ), type = elem.type;
+			return elem.nodeName.toLowerCase() === "input" && "text" === type && ( attr === type || attr === null );
+		},
+
+		radio: function( elem ) {
+			return elem.nodeName.toLowerCase() === "input" && "radio" === elem.type;
+		},
+
+		checkbox: function( elem ) {
+			return elem.nodeName.toLowerCase() === "input" && "checkbox" === elem.type;
+		},
+
+		file: function( elem ) {
+			return elem.nodeName.toLowerCase() === "input" && "file" === elem.type;
+		},
+
+		password: function( elem ) {
+			return elem.nodeName.toLowerCase() === "input" && "password" === elem.type;
+		},
+
+		submit: function( elem ) {
+			var name = elem.nodeName.toLowerCase();
+			return (name === "input" || name === "button") && "submit" === elem.type;
+		},
+
+		image: function( elem ) {
+			return elem.nodeName.toLowerCase() === "input" && "image" === elem.type;
+		},
+
+		reset: function( elem ) {
+			var name = elem.nodeName.toLowerCase();
+			return (name === "input" || name === "button") && "reset" === elem.type;
+		},
+
+		button: function( elem ) {
+			var name = elem.nodeName.toLowerCase();
+			return name === "input" && "button" === elem.type || name === "button";
+		},
+
+		input: function( elem ) {
+			return (/input|select|textarea|button/i).test( elem.nodeName );
+		},
+
+		focus: function( elem ) {
+			return elem === elem.ownerDocument.activeElement;
+		}
+	},
+	setFilters: {
+		first: function( elem, i ) {
+			return i === 0;
+		},
+
+		last: function( elem, i, match, array ) {
+			return i === array.length - 1;
+		},
+
+		even: function( elem, i ) {
+			return i % 2 === 0;
+		},
+
+		odd: function( elem, i ) {
+			return i % 2 === 1;
+		},
+
+		lt: function( elem, i, match ) {
+			return i < match[3] - 0;
+		},
+
+		gt: function( elem, i, match ) {
+			return i > match[3] - 0;
+		},
+
+		nth: function( elem, i, match ) {
+			return match[3] - 0 === i;
+		},
+
+		eq: function( elem, i, match ) {
+			return match[3] - 0 === i;
+		}
+	},
+	filter: {
+		PSEUDO: function( elem, match, i, array ) {
+			var name = match[1],
+				filter = Expr.filters[ name ];
+
+			if ( filter ) {
+				return filter( elem, i, match, array );
+
+			} else if ( name === "contains" ) {
+				return (elem.textContent || elem.innerText || Sizzle.getText([ elem ]) || "").indexOf(match[3]) >= 0;
+
+			} else if ( name === "not" ) {
+				var not = match[3];
+
+				for ( var j = 0, l = not.length; j < l; j++ ) {
+					if ( not[j] === elem ) {
+						return false;
+					}
+				}
+
+				return true;
+
+			} else {
+				Sizzle.error( name );
+			}
+		},
+
+		CHILD: function( elem, match ) {
+			var type = match[1],
+				node = elem;
+
+			switch ( type ) {
+				case "only":
+				case "first":
+					while ( (node = node.previousSibling) )	 {
+						if ( node.nodeType === 1 ) {
+							return false;
+						}
+					}
+
+					if ( type === "first" ) {
+						return true;
+					}
+
+					node = elem;
+
+				case "last":
+					while ( (node = node.nextSibling) )	 {
+						if ( node.nodeType === 1 ) {
+							return false;
+						}
+					}
+
+					return true;
+
+				case "nth":
+					var first = match[2],
+						last = match[3];
+
+					if ( first === 1 && last === 0 ) {
+						return true;
+					}
+
+					var doneName = match[0],
+						parent = elem.parentNode;
+
+					if ( parent && (parent.sizcache !== doneName || !elem.nodeIndex) ) {
+						var count = 0;
+
+						for ( node = parent.firstChild; node; node = node.nextSibling ) {
+							if ( node.nodeType === 1 ) {
+								node.nodeIndex = ++count;
+							}
+						}
+
+						parent.sizcache = doneName;
+					}
+
+					var diff = elem.nodeIndex - last;
+
+					if ( first === 0 ) {
+						return diff === 0;
+
+					} else {
+						return ( diff % first === 0 && diff / first >= 0 );
+					}
+			}
+		},
+
+		ID: function( elem, match ) {
+			return elem.nodeType === 1 && elem.getAttribute("id") === match;
+		},
+
+		TAG: function( elem, match ) {
+			return (match === "*" && elem.nodeType === 1) || elem.nodeName.toLowerCase() === match;
+		},
+
+		CLASS: function( elem, match ) {
+			return (" " + (elem.className || elem.getAttribute("class")) + " ")
+				.indexOf( match ) > -1;
+		},
+
+		ATTR: function( elem, match ) {
+			var name = match[1],
+				result = Expr.attrHandle[ name ] ?
+					Expr.attrHandle[ name ]( elem ) :
+					elem[ name ] != null ?
+						elem[ name ] :
+						elem.getAttribute( name ),
+				value = result + "",
+				type = match[2],
+				check = match[4];
+
+			return result == null ?
+				type === "!=" :
+				type === "=" ?
+				value === check :
+				type === "*=" ?
+				value.indexOf(check) >= 0 :
+				type === "~=" ?
+				(" " + value + " ").indexOf(check) >= 0 :
+				!check ?
+				value && result !== false :
+				type === "!=" ?
+				value !== check :
+				type === "^=" ?
+				value.indexOf(check) === 0 :
+				type === "$=" ?
+				value.substr(value.length - check.length) === check :
+				type === "|=" ?
+				value === check || value.substr(0, check.length + 1) === check + "-" :
+				false;
+		},
+
+		POS: function( elem, match, i, array ) {
+			var name = match[2],
+				filter = Expr.setFilters[ name ];
+
+			if ( filter ) {
+				return filter( elem, i, match, array );
+			}
+		}
+	}
+};
+
+var origPOS = Expr.match.POS,
+	fescape = function(all, num){
+		return "\\" + (num - 0 + 1);
+	};
+
+for ( var type in Expr.match ) {
+	Expr.match[ type ] = new RegExp( Expr.match[ type ].source + (/(?![^\[]*\])(?![^\(]*\))/.source) );
+	Expr.leftMatch[ type ] = new RegExp( /(^(?:.|\r|\n)*?)/.source + Expr.match[ type ].source.replace(/\\(\d+)/g, fescape) );
+}
+
+var makeArray = function( array, results ) {
+	array = Array.prototype.slice.call( array, 0 );
+
+	if ( results ) {
+		results.push.apply( results, array );
+		return results;
+	}
+
+	return array;
+};
+
+try {
+	Array.prototype.slice.call( document.documentElement.childNodes, 0 )[0].nodeType;
+
+} catch( e ) {
+	makeArray = function( array, results ) {
+		var i = 0,
+			ret = results || [];
+
+		if ( toString.call(array) === "[object Array]" ) {
+			Array.prototype.push.apply( ret, array );
+
+		} else {
+			if ( typeof array.length === "number" ) {
+				for ( var l = array.length; i < l; i++ ) {
+					ret.push( array[i] );
+				}
+
+			} else {
+				for ( ; array[i]; i++ ) {
+					ret.push( array[i] );
+				}
+			}
+		}
+
+		return ret;
+	};
+}
+
+var sortOrder, siblingCheck;
+
+if ( document.documentElement.compareDocumentPosition ) {
+	sortOrder = function( a, b ) {
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
+		}
+
+		if ( !a.compareDocumentPosition || !b.compareDocumentPosition ) {
+			return a.compareDocumentPosition ? -1 : 1;
+		}
+
+		return a.compareDocumentPosition(b) & 4 ? -1 : 1;
+	};
+
+} else {
+	sortOrder = function( a, b ) {
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
+
+		} else if ( a.sourceIndex && b.sourceIndex ) {
+			return a.sourceIndex - b.sourceIndex;
+		}
+
+		var al, bl,
+			ap = [],
+			bp = [],
+			aup = a.parentNode,
+			bup = b.parentNode,
+			cur = aup;
+
+		if ( aup === bup ) {
+			return siblingCheck( a, b );
+
+		} else if ( !aup ) {
+			return -1;
+
+		} else if ( !bup ) {
+			return 1;
+		}
+
+		while ( cur ) {
+			ap.unshift( cur );
+			cur = cur.parentNode;
+		}
+
+		cur = bup;
+
+		while ( cur ) {
+			bp.unshift( cur );
+			cur = cur.parentNode;
+		}
+
+		al = ap.length;
+		bl = bp.length;
+
+		for ( var i = 0; i < al && i < bl; i++ ) {
+			if ( ap[i] !== bp[i] ) {
+				return siblingCheck( ap[i], bp[i] );
+			}
+		}
+
+		return i === al ?
+			siblingCheck( a, bp[i], -1 ) :
+			siblingCheck( ap[i], b, 1 );
+	};
+
+	siblingCheck = function( a, b, ret ) {
+		if ( a === b ) {
+			return ret;
+		}
+
+		var cur = a.nextSibling;
+
+		while ( cur ) {
+			if ( cur === b ) {
+				return -1;
+			}
+
+			cur = cur.nextSibling;
+		}
+
+		return 1;
+	};
+}
+
+Sizzle.getText = function( elems ) {
+	var ret = "", elem;
+
+	for ( var i = 0; elems[i]; i++ ) {
+		elem = elems[i];
+
+		if ( elem.nodeType === 3 || elem.nodeType === 4 ) {
+			ret += elem.nodeValue;
+
+		} else if ( elem.nodeType !== 8 ) {
+			ret += Sizzle.getText( elem.childNodes );
+		}
+	}
+
+	return ret;
+};
+
+(function(){
+	var form = document.createElement("div"),
+		id = "script" + (new Date()).getTime(),
+		root = document.documentElement;
+
+	form.innerHTML = "<a name='" + id + "'/>";
+
+	root.insertBefore( form, root.firstChild );
+
+	if ( document.getElementById( id ) ) {
+		Expr.find.ID = function( match, context, isXML ) {
+			if ( typeof context.getElementById !== "undefined" && !isXML ) {
+				var m = context.getElementById(match[1]);
+
+				return m ?
+					m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ?
+						[m] :
+						undefined :
+					[];
+			}
+		};
+
+		Expr.filter.ID = function( elem, match ) {
+			var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
+
+			return elem.nodeType === 1 && node && node.nodeValue === match;
+		};
+	}
+
+	root.removeChild( form );
+
+	root = form = null;
+})();
+
+(function(){
+
+	var div = document.createElement("div");
+	div.appendChild( document.createComment("") );
+
+	if ( div.getElementsByTagName("*").length > 0 ) {
+		Expr.find.TAG = function( match, context ) {
+			var results = context.getElementsByTagName( match[1] );
+
+			if ( match[1] === "*" ) {
+				var tmp = [];
+
+				for ( var i = 0; results[i]; i++ ) {
+					if ( results[i].nodeType === 1 ) {
+						tmp.push( results[i] );
+					}
+				}
+
+				results = tmp;
+			}
+
+			return results;
+		};
+	}
+
+	div.innerHTML = "<a href='#'></a>";
+
+	if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&
+			div.firstChild.getAttribute("href") !== "#" ) {
+
+		Expr.attrHandle.href = function( elem ) {
+			return elem.getAttribute( "href", 2 );
+		};
+	}
+
+	div = null;
+})();
+
+if ( document.querySelectorAll ) {
+	(function(){
+		var oldSizzle = Sizzle,
+			div = document.createElement("div"),
+			id = "__sizzle__";
+
+		div.innerHTML = "<p class='TEST'></p>";
+
+		if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {
+			return;
+		}
+
+		Sizzle = function( query, context, extra, seed ) {
+			context = context || document;
+
+			if ( !seed && !Sizzle.isXML(context) ) {
+				var match = /^(\w+$)|^\.([\w\-]+$)|^#([\w\-]+$)/.exec( query );
+
+				if ( match && (context.nodeType === 1 || context.nodeType === 9) ) {
+					if ( match[1] ) {
+						return makeArray( context.getElementsByTagName( query ), extra );
+
+					} else if ( match[2] && Expr.find.CLASS && context.getElementsByClassName ) {
+						return makeArray( context.getElementsByClassName( match[2] ), extra );
+					}
+				}
+
+				if ( context.nodeType === 9 ) {
+					if ( query === "body" && context.body ) {
+						return makeArray( [ context.body ], extra );
+
+					} else if ( match && match[3] ) {
+						var elem = context.getElementById( match[3] );
+
+						if ( elem && elem.parentNode ) {
+							if ( elem.id === match[3] ) {
+								return makeArray( [ elem ], extra );
+							}
+
+						} else {
+							return makeArray( [], extra );
+						}
+					}
+
+					try {
+						return makeArray( context.querySelectorAll(query), extra );
+					} catch(qsaError) {}
+
+				} else if ( context.nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
+					var oldContext = context,
+						old = context.getAttribute( "id" ),
+						nid = old || id,
+						hasParent = context.parentNode,
+						relativeHierarchySelector = /^\s*[+~]/.test( query );
+
+					if ( !old ) {
+						context.setAttribute( "id", nid );
+					} else {
+						nid = nid.replace( /'/g, "\\$&" );
+					}
+					if ( relativeHierarchySelector && hasParent ) {
+						context = context.parentNode;
+					}
+
+					try {
+						if ( !relativeHierarchySelector || hasParent ) {
+							return makeArray( context.querySelectorAll( "[id='" + nid + "'] " + query ), extra );
+						}
+
+					} catch(pseudoError) {
+					} finally {
+						if ( !old ) {
+							oldContext.removeAttribute( "id" );
+						}
+					}
+				}
+			}
+
+			return oldSizzle(query, context, extra, seed);
+		};
+
+		for ( var prop in oldSizzle ) {
+			Sizzle[ prop ] = oldSizzle[ prop ];
+		}
+
+		div = null;
+	})();
+}
+
+(function(){
+	var html = document.documentElement,
+		matches = html.matchesSelector || html.mozMatchesSelector || html.webkitMatchesSelector || html.msMatchesSelector;
+
+	if ( matches ) {
+		var disconnectedMatch = !matches.call( document.createElement( "div" ), "div" ),
+			pseudoWorks = false;
+
+		try {
+			matches.call( document.documentElement, "[test!='']:sizzle" );
+
+		} catch( pseudoError ) {
+			pseudoWorks = true;
+		}
+
+		Sizzle.matchesSelector = function( node, expr ) {
+			expr = expr.replace(/\=\s*([^'"\]]*)\s*\]/g, "='$1']");
+
+			if ( !Sizzle.isXML( node ) ) {
+				try {
+					if ( pseudoWorks || !Expr.match.PSEUDO.test( expr ) && !/!=/.test( expr ) ) {
+						var ret = matches.call( node, expr );
+
+						if ( ret || !disconnectedMatch ||
+								node.document && node.document.nodeType !== 11 ) {
+							return ret;
+						}
+					}
+				} catch(e) {}
+			}
+
+			return Sizzle(expr, null, null, [node]).length > 0;
+		};
+	}
+})();
+
+(function(){
+	var div = document.createElement("div");
+
+	div.innerHTML = "<div class='test e'></div><div class='test'></div>";
+
+	if ( !div.getElementsByClassName || div.getElementsByClassName("e").length === 0 ) {
+		return;
+	}
+
+	div.lastChild.className = "e";
+
+	if ( div.getElementsByClassName("e").length === 1 ) {
+		return;
+	}
+
+	Expr.order.splice(1, 0, "CLASS");
+	Expr.find.CLASS = function( match, context, isXML ) {
+		if ( typeof context.getElementsByClassName !== "undefined" && !isXML ) {
+			return context.getElementsByClassName(match[1]);
+		}
+	};
+
+	div = null;
+})();
+
+function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
+	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
+		var elem = checkSet[i];
+
+		if ( elem ) {
+			var match = false;
+
+			elem = elem[dir];
+
+			while ( elem ) {
+				if ( elem.sizcache === doneName ) {
+					match = checkSet[elem.sizset];
+					break;
+				}
+
+				if ( elem.nodeType === 1 && !isXML ){
+					elem.sizcache = doneName;
+					elem.sizset = i;
+				}
+
+				if ( elem.nodeName.toLowerCase() === cur ) {
+					match = elem;
+					break;
+				}
+
+				elem = elem[dir];
+			}
+
+			checkSet[i] = match;
+		}
+	}
+}
+
+function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
+	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
+		var elem = checkSet[i];
+
+		if ( elem ) {
+			var match = false;
+
+			elem = elem[dir];
+
+			while ( elem ) {
+				if ( elem.sizcache === doneName ) {
+					match = checkSet[elem.sizset];
+					break;
+				}
+
+				if ( elem.nodeType === 1 ) {
+					if ( !isXML ) {
+						elem.sizcache = doneName;
+						elem.sizset = i;
+					}
+
+					if ( typeof cur !== "string" ) {
+						if ( elem === cur ) {
+							match = true;
+							break;
+						}
+
+					} else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
+						match = elem;
+						break;
+					}
+				}
+
+				elem = elem[dir];
+			}
+
+			checkSet[i] = match;
+		}
+	}
+}
+
+if ( document.documentElement.contains ) {
+	Sizzle.contains = function( a, b ) {
+		return a !== b && (a.contains ? a.contains(b) : true);
+	};
+
+} else if ( document.documentElement.compareDocumentPosition ) {
+	Sizzle.contains = function( a, b ) {
+		return !!(a.compareDocumentPosition(b) & 16);
+	};
+
+} else {
+	Sizzle.contains = function() {
+		return false;
+	};
+}
+
+Sizzle.isXML = function( elem ) {
+	var documentElement = (elem ? elem.ownerDocument || elem : 0).documentElement;
+
+	return documentElement ? documentElement.nodeName !== "HTML" : false;
+};
+
+var posProcess = function( selector, context ) {
+	var match,
+		tmpSet = [],
+		later = "",
+		root = context.nodeType ? [context] : context;
+
+	while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
+		later += match[0];
+		selector = selector.replace( Expr.match.PSEUDO, "" );
+	}
+
+	selector = Expr.relative[selector] ? selector + "*" : selector;
+
+	for ( var i = 0, l = root.length; i < l; i++ ) {
+		Sizzle( selector, root[i], tmpSet );
+	}
+
+	return Sizzle.filter( later, tmpSet );
+};
+
+
+window.Sizzle = Sizzle;
+
+})();
+
+Prototype._original_property = window.Sizzle;
+
+;(function(engine) {
+  var extendElements = Prototype.Selector.extendElements;
+
+  function select(selector, scope) {
+    return extendElements(engine(selector, scope || document));
+  }
+
+  function match(element, selector) {
+    return engine.matches(selector, [element]).length == 1;
+  }
+
+  Prototype.Selector.engine = engine;
+  Prototype.Selector.select = select;
+  Prototype.Selector.match = match;
+})(Sizzle);
+
+window.Sizzle = Prototype._original_property;
+delete Prototype._original_property;
+
+var Form = {
+  reset: function(form) {
+    form = $(form);
+    form.reset();
+    return form;
+  },
+
+  serializeElements: function(elements, options) {
+    if (typeof options != 'object') options = { hash: !!options };
+    else if (Object.isUndefined(options.hash)) options.hash = true;
+    var key, value, submitted = false, submit = options.submit, accumulator, initial;
+
+    if (options.hash) {
+      initial = {};
+      accumulator = function(result, key, value) {
+        if (key in result) {
+          if (!Object.isArray(result[key])) result[key] = [result[key]];
+          result[key].push(value);
+        } else result[key] = value;
+        return result;
+      };
+    } else {
+      initial = '';
+      accumulator = function(result, key, value) {
+        value = value.gsub(/(\r)?\n/, '\r\n');
+        value = encodeURIComponent(value);
+        value = value.gsub(/%20/, '+');
+        return result + (result ? '&' : '') + encodeURIComponent(key) + '=' + value;
+      }
+    }
+
+    return elements.inject(initial, function(result, element) {
+      if (!element.disabled && element.name) {
+        key = element.name; value = $(element).getValue();
+        if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&
+            submit !== false && (!submit || key == submit) && (submitted = true)))) {
+          result = accumulator(result, key, value);
+        }
+      }
+      return result;
+    });
+  }
+};
+
+Form.Methods = {
+  serialize: function(form, options) {
+    return Form.serializeElements(Form.getElements(form), options);
+  },
+
+
+  getElements: function(form) {
+    var elements = $(form).getElementsByTagName('*');
+    var element, results = [], serializers = Form.Element.Serializers;
+
+    for (var i = 0; element = elements[i]; i++) {
+      if (serializers[element.tagName.toLowerCase()])
+        results.push(Element.extend(element));
+    }
+    return results;
+  },
+
+  getInputs: function(form, typeName, name) {
+    form = $(form);
+    var inputs = form.getElementsByTagName('input');
+
+    if (!typeName && !name) return $A(inputs).map(Element.extend);
+
+    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
+      var input = inputs[i];
+      if ((typeName && input.type != typeName) || (name && input.name != name))
+        continue;
+      matchingInputs.push(Element.extend(input));
+    }
+
+    return matchingInputs;
+  },
+
+  disable: function(form) {
+    form = $(form);
+    Form.getElements(form).invoke('disable');
+    return form;
+  },
+
+  enable: function(form) {
+    form = $(form);
+    Form.getElements(form).invoke('enable');
+    return form;
+  },
+
+  findFirstElement: function(form) {
+    var elements = $(form).getElements().findAll(function(element) {
+      return 'hidden' != element.type && !element.disabled;
+    });
+    var firstByIndex = elements.findAll(function(element) {
+      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
+    }).sortBy(function(element) { return element.tabIndex }).first();
+
+    return firstByIndex ? firstByIndex : elements.find(function(element) {
+      return /^(?:input|select|textarea)$/i.test(element.tagName);
+    });
+  },
+
+  focusFirstElement: function(form) {
+    form = $(form);
+    var element = form.findFirstElement();
+    if (element) element.activate();
+    return form;
+  },
+
+  request: function(form, options) {
+    form = $(form), options = Object.clone(options || { });
+
+    var params = options.parameters, action = form.readAttribute('action') || '';
+    if (action.blank()) action = window.location.href;
+    options.parameters = form.serialize(true);
+
+    if (params) {
+      if (Object.isString(params)) params = params.toQueryParams();
+      Object.extend(options.parameters, params);
+    }
+
+    if (form.hasAttribute('method') && !options.method)
+      options.method = form.method;
+
+    return new Ajax.Request(action, options);
+  }
+};
+
+/*--------------------------------------------------------------------------*/
+
+
+Form.Element = {
+  focus: function(element) {
+    $(element).focus();
+    return element;
+  },
+
+  select: function(element) {
+    $(element).select();
+    return element;
+  }
+};
+
+Form.Element.Methods = {
+
+  serialize: function(element) {
+    element = $(element);
+    if (!element.disabled && element.name) {
+      var value = element.getValue();
+      if (value != undefined) {
+        var pair = { };
+        pair[element.name] = value;
+        return Object.toQueryString(pair);
+      }
+    }
+    return '';
+  },
+
+  getValue: function(element) {
+    element = $(element);
+    var method = element.tagName.toLowerCase();
+    return Form.Element.Serializers[method](element);
+  },
+
+  setValue: function(element, value) {
+    element = $(element);
+    var method = element.tagName.toLowerCase();
+    Form.Element.Serializers[method](element, value);
+    return element;
+  },
+
+  clear: function(element) {
+    $(element).value = '';
+    return element;
+  },
+
+  present: function(element) {
+    return $(element).value != '';
+  },
+
+  activate: function(element) {
+    element = $(element);
+    try {
+      element.focus();
+      if (element.select && (element.tagName.toLowerCase() != 'input' ||
+          !(/^(?:button|reset|submit)$/i.test(element.type))))
+        element.select();
+    } catch (e) { }
+    return element;
+  },
+
+  disable: function(element) {
+    element = $(element);
+    element.disabled = true;
+    return element;
+  },
+
+  enable: function(element) {
+    element = $(element);
+    element.disabled = false;
+    return element;
+  }
+};
+
+/*--------------------------------------------------------------------------*/
+
+var Field = Form.Element;
+
+var $F = Form.Element.Methods.getValue;
+
+/*--------------------------------------------------------------------------*/
+
+Form.Element.Serializers = (function() {
+  function input(element, value) {
+    switch (element.type.toLowerCase()) {
+      case 'checkbox':
+      case 'radio':
+        return inputSelector(element, value);
+      default:
+        return valueSelector(element, value);
+    }
+  }
+
+  function inputSelector(element, value) {
+    if (Object.isUndefined(value))
+      return element.checked ? element.value : null;
+    else element.checked = !!value;
+  }
+
+  function valueSelector(element, value) {
+    if (Object.isUndefined(value)) return element.value;
+    else element.value = value;
+  }
+
+  function select(element, value) {
+    if (Object.isUndefined(value))
+      return (element.type === 'select-one' ? selectOne : selectMany)(element);
+
+    var opt, currentValue, single = !Object.isArray(value);
+    for (var i = 0, length = element.length; i < length; i++) {
+      opt = element.options[i];
+      currentValue = this.optionValue(opt);
+      if (single) {
+        if (currentValue == value) {
+          opt.selected = true;
+          return;
+        }
+      }
+      else opt.selected = value.include(currentValue);
+    }
+  }
+
+  function selectOne(element) {
+    var index = element.selectedIndex;
+    return index >= 0 ? optionValue(element.options[index]) : null;
+  }
+
+  function selectMany(element) {
+    var values, length = element.length;
+    if (!length) return null;
+
+    for (var i = 0, values = []; i < length; i++) {
+      var opt = element.options[i];
+      if (opt.selected) values.push(optionValue(opt));
+    }
+    return values;
+  }
+
+  function optionValue(opt) {
+    return Element.hasAttribute(opt, 'value') ? opt.value : opt.text;
+  }
+
+  return {
+    input:         input,
+    inputSelector: inputSelector,
+    textarea:      valueSelector,
+    select:        select,
+    selectOne:     selectOne,
+    selectMany:    selectMany,
+    optionValue:   optionValue,
+    button:        valueSelector
+  };
+})();
+
+/*--------------------------------------------------------------------------*/
+
+
+Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
+  initialize: function($super, element, frequency, callback) {
+    $super(callback, frequency);
+    this.element   = $(element);
+    this.lastValue = this.getValue();
+  },
+
+  execute: function() {
+    var value = this.getValue();
+    if (Object.isString(this.lastValue) && Object.isString(value) ?
+        this.lastValue != value : String(this.lastValue) != String(value)) {
+      this.callback(this.element, value);
+      this.lastValue = value;
+    }
+  }
+});
+
+Form.Element.Observer = Class.create(Abstract.TimedObserver, {
+  getValue: function() {
+    return Form.Element.getValue(this.element);
+  }
+});
+
+Form.Observer = Class.create(Abstract.TimedObserver, {
+  getValue: function() {
+    return Form.serialize(this.element);
+  }
+});
+
+/*--------------------------------------------------------------------------*/
+
+Abstract.EventObserver = Class.create({
+  initialize: function(element, callback) {
+    this.element  = $(element);
+    this.callback = callback;
+
+    this.lastValue = this.getValue();
+    if (this.element.tagName.toLowerCase() == 'form')
+      this.registerFormCallbacks();
+    else
+      this.registerCallback(this.element);
+  },
+
+  onElementEvent: function() {
+    var value = this.getValue();
+    if (this.lastValue != value) {
+      this.callback(this.element, value);
+      this.lastValue = value;
+    }
+  },
+
+  registerFormCallbacks: function() {
+    Form.getElements(this.element).each(this.registerCallback, this);
+  },
+
+  registerCallback: function(element) {
+    if (element.type) {
+      switch (element.type.toLowerCase()) {
+        case 'checkbox':
+        case 'radio':
+          Event.observe(element, 'click', this.onElementEvent.bind(this));
+          break;
+        default:
+          Event.observe(element, 'change', this.onElementEvent.bind(this));
+          break;
+      }
+    }
+  }
+});
+
+Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
+  getValue: function() {
+    return Form.Element.getValue(this.element);
+  }
+});
+
+Form.EventObserver = Class.create(Abstract.EventObserver, {
+  getValue: function() {
+    return Form.serialize(this.element);
+  }
+});
+(function(GLOBAL) {
+  var DIV = document.createElement('div');
+  var docEl = document.documentElement;
+  var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
+   && 'onmouseleave' in docEl;
+
+  var Event = {
+    KEY_BACKSPACE: 8,
+    KEY_TAB:       9,
+    KEY_RETURN:   13,
+    KEY_ESC:      27,
+    KEY_LEFT:     37,
+    KEY_UP:       38,
+    KEY_RIGHT:    39,
+    KEY_DOWN:     40,
+    KEY_DELETE:   46,
+    KEY_HOME:     36,
+    KEY_END:      35,
+    KEY_PAGEUP:   33,
+    KEY_PAGEDOWN: 34,
+    KEY_INSERT:   45
+  };
+
+
+  var isIELegacyEvent = function(event) { return false; };
+
+  if (window.attachEvent) {
+    if (window.addEventListener) {
+      isIELegacyEvent = function(event) {
+        return !(event instanceof window.Event);
+      };
+    } else {
+      isIELegacyEvent = function(event) { return true; };
+    }
+  }
+
+  var _isButton;
+
+  function _isButtonForDOMEvents(event, code) {
+    return event.which ? (event.which === code + 1) : (event.button === code);
+  }
+
+  var legacyButtonMap = { 0: 1, 1: 4, 2: 2 };
+  function _isButtonForLegacyEvents(event, code) {
+    return event.button === legacyButtonMap[code];
+  }
+
+  function _isButtonForWebKit(event, code) {
+    switch (code) {
+      case 0: return event.which == 1 && !event.metaKey;
+      case 1: return event.which == 2 || (event.which == 1 && event.metaKey);
+      case 2: return event.which == 3;
+      default: return false;
+    }
+  }
+
+  if (window.attachEvent) {
+    if (!window.addEventListener) {
+      _isButton = _isButtonForLegacyEvents;
+    } else {
+      _isButton = function(event, code) {
+        return isIELegacyEvent(event) ? _isButtonForLegacyEvents(event, code) :
+         _isButtonForDOMEvents(event, code);
+      }
+    }
+  } else if (Prototype.Browser.WebKit) {
+    _isButton = _isButtonForWebKit;
+  } else {
+    _isButton = _isButtonForDOMEvents;
+  }
+
+  function isLeftClick(event)   { return _isButton(event, 0) }
+
+  function isMiddleClick(event) { return _isButton(event, 1) }
+
+  function isRightClick(event)  { return _isButton(event, 2) }
+
+  function element(event) {
+    return Element.extend(_element(event));
+  }
+
+  function _element(event) {
+    event = Event.extend(event);
+
+    var node = event.target, type = event.type,
+     currentTarget = event.currentTarget;
+
+    if (currentTarget && currentTarget.tagName) {
+      if (type === 'load' || type === 'error' ||
+        (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'
+          && currentTarget.type === 'radio'))
+            node = currentTarget;
+    }
+
+    if (node.nodeType == Node.TEXT_NODE)
+      node = node.parentNode;
+
+    return Element.extend(node);
+  }
+
+  function findElement(event, expression) {
+    var element = _element(event), match = Prototype.Selector.match;
+    if (!expression) return Element.extend(element);
+    while (element) {
+      if (Object.isElement(element) && match(element, expression))
+        return Element.extend(element);
+      element = element.parentNode;
+    }
+  }
+
+  function pointer(event) {
+    return { x: pointerX(event), y: pointerY(event) };
+  }
+
+  function pointerX(event) {
+    var docElement = document.documentElement,
+     body = document.body || { scrollLeft: 0 };
+
+    return event.pageX || (event.clientX +
+      (docElement.scrollLeft || body.scrollLeft) -
+      (docElement.clientLeft || 0));
+  }
+
+  function pointerY(event) {
+    var docElement = document.documentElement,
+     body = document.body || { scrollTop: 0 };
+
+    return  event.pageY || (event.clientY +
+       (docElement.scrollTop || body.scrollTop) -
+       (docElement.clientTop || 0));
+  }
+
+
+  function stop(event) {
+    Event.extend(event);
+    event.preventDefault();
+    event.stopPropagation();
+
+    event.stopped = true;
+  }
+
+
+  Event.Methods = {
+    isLeftClick:   isLeftClick,
+    isMiddleClick: isMiddleClick,
+    isRightClick:  isRightClick,
+
+    element:     element,
+    findElement: findElement,
+
+    pointer:  pointer,
+    pointerX: pointerX,
+    pointerY: pointerY,
+
+    stop: stop
+  };
+
+  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
+    m[name] = Event.Methods[name].methodize();
+    return m;
+  });
+
+  if (window.attachEvent) {
+    function _relatedTarget(event) {
+      var element;
+      switch (event.type) {
+        case 'mouseover':
+        case 'mouseenter':
+          element = event.fromElement;
+          break;
+        case 'mouseout':
+        case 'mouseleave':
+          element = event.toElement;
+          break;
+        default:
+          return null;
+      }
+      return Element.extend(element);
+    }
+
+    var additionalMethods = {
+      stopPropagation: function() { this.cancelBubble = true },
+      preventDefault:  function() { this.returnValue = false },
+      inspect: function() { return '[object Event]' }
+    };
+
+    Event.extend = function(event, element) {
+      if (!event) return false;
+
+      if (!isIELegacyEvent(event)) return event;
+
+      if (event._extendedByPrototype) return event;
+      event._extendedByPrototype = Prototype.emptyFunction;
+
+      var pointer = Event.pointer(event);
+
+      Object.extend(event, {
+        target: event.srcElement || element,
+        relatedTarget: _relatedTarget(event),
+        pageX:  pointer.x,
+        pageY:  pointer.y
+      });
+
+      Object.extend(event, methods);
+      Object.extend(event, additionalMethods);
+
+      return event;
+    };
+  } else {
+    Event.extend = Prototype.K;
+  }
+
+  if (window.addEventListener) {
+    Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;
+    Object.extend(Event.prototype, methods);
+  }
+
+  var EVENT_TRANSLATIONS = {
+    mouseenter: 'mouseover',
+    mouseleave: 'mouseout'
+  };
+
+  function getDOMEventName(eventName) {
+    return EVENT_TRANSLATIONS[eventName] || eventName;
+  }
+
+  if (MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED)
+    getDOMEventName = Prototype.K;
+
+  function getUniqueElementID(element) {
+    if (element === window) return 0;
+
+    if (typeof element._prototypeUID === 'undefined')
+      element._prototypeUID = Element.Storage.UID++;
+    return element._prototypeUID;
+  }
+
+  function getUniqueElementID_IE(element) {
+    if (element === window) return 0;
+    if (element == document) return 1;
+    return element.uniqueID;
+  }
+
+  if ('uniqueID' in DIV)
+    getUniqueElementID = getUniqueElementID_IE;
+
+  function isCustomEvent(eventName) {
+    return eventName.include(':');
+  }
+
+  Event._isCustomEvent = isCustomEvent;
+
+  function getRegistryForElement(element, uid) {
+    var CACHE = GLOBAL.Event.cache;
+    if (Object.isUndefined(uid))
+      uid = getUniqueElementID(element);
+    if (!CACHE[uid]) CACHE[uid] = { element: element };
+    return CACHE[uid];
+  }
+
+  function destroyRegistryForElement(element, uid) {
+    if (Object.isUndefined(uid))
+      uid = getUniqueElementID(element);
+    delete GLOBAL.Event.cache[uid];
+  }
+
+
+  function register(element, eventName, handler) {
+    var registry = getRegistryForElement(element);
+    if (!registry[eventName]) registry[eventName] = [];
+    var entries = registry[eventName];
+
+    var i = entries.length;
+    while (i--)
+      if (entries[i].handler === handler) return null;
+
+    var uid = getUniqueElementID(element);
+    var responder = GLOBAL.Event._createResponder(uid, eventName, handler);
+    var entry = {
+      responder: responder,
+      handler:   handler
+    };
+
+    entries.push(entry);
+    return entry;
+  }
+
+  function unregister(element, eventName, handler) {
+    var registry = getRegistryForElement(element);
+    var entries = registry[eventName];
+    if (!entries) return;
+
+    var i = entries.length, entry;
+    while (i--) {
+      if (entries[i].handler === handler) {
+        entry = entries[i];
+        break;
+      }
+    }
+
+    if (!entry) return;
+
+    var index = entries.indexOf(entry);
+    entries.splice(index, 1);
+
+    return entry;
+  }
+
+
+  function observe(element, eventName, handler) {
+    element = $(element);
+    var entry = register(element, eventName, handler);
+
+    if (entry === null) return element;
+
+    var responder = entry.responder;
+    if (isCustomEvent(eventName))
+      observeCustomEvent(element, eventName, responder);
+    else
+      observeStandardEvent(element, eventName, responder);
+
+    return element;
+  }
+
+  function observeStandardEvent(element, eventName, responder) {
+    var actualEventName = getDOMEventName(eventName);
+    if (element.addEventListener) {
+      element.addEventListener(actualEventName, responder, false);
+    } else {
+      element.attachEvent('on' + actualEventName, responder);
+    }
+  }
+
+  function observeCustomEvent(element, eventName, responder) {
+    if (element.addEventListener) {
+      element.addEventListener('dataavailable', responder, false);
+    } else {
+      element.attachEvent('ondataavailable', responder);
+      element.attachEvent('onlosecapture',   responder);
+    }
+  }
+
+  function stopObserving(element, eventName, handler) {
+    element = $(element);
+    var handlerGiven = !Object.isUndefined(handler),
+     eventNameGiven = !Object.isUndefined(eventName);
+
+    if (!eventNameGiven && !handlerGiven) {
+      stopObservingElement(element);
+      return element;
+    }
+
+    if (!handlerGiven) {
+      stopObservingEventName(element, eventName);
+      return element;
+    }
+
+    var entry = unregister(element, eventName, handler);
+
+    if (!entry) return element;
+    removeEvent(element, eventName, entry.responder);
+    return element;
+  }
+
+  function stopObservingStandardEvent(element, eventName, responder) {
+    var actualEventName = getDOMEventName(eventName);
+    if (element.removeEventListener) {
+      element.removeEventListener(actualEventName, responder, false);
+    } else {
+      element.detachEvent('on' + actualEventName, responder);
+    }
+  }
+
+  function stopObservingCustomEvent(element, eventName, responder) {
+    if (element.removeEventListener) {
+      element.removeEventListener('dataavailable', responder, false);
+    } else {
+      element.detachEvent('ondataavailable', responder);
+      element.detachEvent('onlosecapture',   responder);
+    }
+  }
+
+
+
+  function stopObservingElement(element) {
+    var uid = getUniqueElementID(element),
+     registry = getRegistryForElement(element, uid);
+
+    destroyRegistryForElement(element, uid);
+
+    var entries, i;
+    for (var eventName in registry) {
+      if (eventName === 'element') continue;
+
+      entries = registry[eventName];
+      i = entries.length;
+      while (i--)
+        removeEvent(element, eventName, entries[i].responder);
+    }
+  }
+
+  function stopObservingEventName(element, eventName) {
+    var registry = getRegistryForElement(element);
+    var entries = registry[eventName];
+    if (!entries) return;
+    delete registry[eventName];
+
+    var i = entries.length;
+    while (i--)
+      removeEvent(element, eventName, entries[i].responder);
+  }
+
+
+  function removeEvent(element, eventName, handler) {
+    if (isCustomEvent(eventName))
+      stopObservingCustomEvent(element, eventName, handler);
+    else
+      stopObservingStandardEvent(element, eventName, handler);
+  }
+
+
+
+  function getFireTarget(element) {
+    if (element !== document) return element;
+    if (document.createEvent && !element.dispatchEvent)
+      return document.documentElement;
+    return element;
+  }
+
+  function fire(element, eventName, memo, bubble) {
+    element = getFireTarget($(element));
+    if (Object.isUndefined(bubble)) bubble = true;
+    memo = memo || {};
+
+    var event = fireEvent(element, eventName, memo, bubble);
+    return Event.extend(event);
+  }
+
+  function fireEvent_DOM(element, eventName, memo, bubble) {
+    var event = document.createEvent('HTMLEvents');
+    event.initEvent('dataavailable', bubble, true);
+
+    event.eventName = eventName;
+    event.memo = memo;
+
+    element.dispatchEvent(event);
+    return event;
+  }
+
+  function fireEvent_IE(element, eventName, memo, bubble) {
+    var event = document.createEventObject();
+    event.eventType = bubble ? 'ondataavailable' : 'onlosecapture';
+
+    event.eventName = eventName;
+    event.memo = memo;
+
+    element.fireEvent(event.eventType, event);
+    return event;
+  }
+
+  var fireEvent = document.createEvent ? fireEvent_DOM : fireEvent_IE;
+
+
+
+  Event.Handler = Class.create({
+    initialize: function(element, eventName, selector, callback) {
+      this.element   = $(element);
+      this.eventName = eventName;
+      this.selector  = selector;
+      this.callback  = callback;
+      this.handler   = this.handleEvent.bind(this);
+    },
+
+
+    start: function() {
+      Event.observe(this.element, this.eventName, this.handler);
+      return this;
+    },
+
+    stop: function() {
+      Event.stopObserving(this.element, this.eventName, this.handler);
+      return this;
+    },
+
+    handleEvent: function(event) {
+      var element = Event.findElement(event, this.selector);
+      if (element) this.callback.call(this.element, event, element);
+    }
+  });
+
+  function on(element, eventName, selector, callback) {
+    element = $(element);
+    if (Object.isFunction(selector) && Object.isUndefined(callback)) {
+      callback = selector, selector = null;
+    }
+
+    return new Event.Handler(element, eventName, selector, callback).start();
+  }
+
+  Object.extend(Event, Event.Methods);
+
+  Object.extend(Event, {
+    fire:          fire,
+    observe:       observe,
+    stopObserving: stopObserving,
+    on:            on
+  });
+
+  Element.addMethods({
+    fire:          fire,
+
+    observe:       observe,
+
+    stopObserving: stopObserving,
+
+    on:            on
+  });
+
+  Object.extend(document, {
+    fire:          fire.methodize(),
+
+    observe:       observe.methodize(),
+
+    stopObserving: stopObserving.methodize(),
+
+    on:            on.methodize(),
+
+    loaded:        false
+  });
+
+  if (GLOBAL.Event) Object.extend(window.Event, Event);
+  else GLOBAL.Event = Event;
+
+  GLOBAL.Event.cache = {};
+
+  function destroyCache_IE() {
+    GLOBAL.Event.cache = null;
+  }
+
+  if (window.attachEvent)
+    window.attachEvent('onunload', destroyCache_IE);
+
+  DIV = null;
+  docEl = null;
+})(this);
+
+(function(GLOBAL) {
+  /* Code for creating leak-free event responders is based on work by
+   John-David Dalton. */
+
+  var docEl = document.documentElement;
+  var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
+    && 'onmouseleave' in docEl;
+
+  function isSimulatedMouseEnterLeaveEvent(eventName) {
+    return !MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&
+     (eventName === 'mouseenter' || eventName === 'mouseleave');
+  }
+
+  function createResponder(uid, eventName, handler) {
+    if (Event._isCustomEvent(eventName))
+      return createResponderForCustomEvent(uid, eventName, handler);
+    if (isSimulatedMouseEnterLeaveEvent(eventName))
+      return createMouseEnterLeaveResponder(uid, eventName, handler);
+
+    return function(event) {
+      var cacheEntry = Event.cache[uid];
+      var element = cacheEntry.element;
+
+      Event.extend(event, element);
+      handler.call(element, event);
+    };
+  }
+
+  function createResponderForCustomEvent(uid, eventName, handler) {
+    return function(event) {
+      var cacheEntry = Event.cache[uid], element = cacheEntry.element;
+
+      if (Object.isUndefined(event.eventName))
+        return false;
+
+      if (event.eventName !== eventName)
+        return false;
+
+      Event.extend(event, element);
+      handler.call(element, event);
+    };
+  }
+
+  function createMouseEnterLeaveResponder(uid, eventName, handler) {
+    return function(event) {
+      var cacheEntry = Event.cache[uid], element = cacheEntry.element;
+
+      Event.extend(event, element);
+      var parent = event.relatedTarget;
+
+      while (parent && parent !== element) {
+        try { parent = parent.parentNode; }
+        catch(e) { parent = element; }
+      }
+
+      if (parent === element) return;
+      handler.call(element, event);
+    }
+  }
+
+  GLOBAL.Event._createResponder = createResponder;
+  docEl = null;
+})(this);
+
+(function(GLOBAL) {
+  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
+     Matthias Miller, Dean Edwards, John Resig, and Diego Perini. */
+
+  var TIMER;
+
+  function fireContentLoadedEvent() {
+    if (document.loaded) return;
+    if (TIMER) window.clearTimeout(TIMER);
+    document.loaded = true;
+    document.fire('dom:loaded');
+  }
+
+  function checkReadyState() {
+    if (document.readyState === 'complete') {
+      document.detachEvent('onreadystatechange', checkReadyState);
+      fireContentLoadedEvent();
+    }
+  }
+
+  function pollDoScroll() {
+    try {
+      document.documentElement.doScroll('left');
+    } catch (e) {
+      TIMER = pollDoScroll.defer();
+      return;
+    }
+
+    fireContentLoadedEvent();
+  }
+
+  if (document.addEventListener) {
+    document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);
+  } else {
+    document.attachEvent('onreadystatechange', checkReadyState);
+    if (window == top) TIMER = pollDoScroll.defer();
+  }
+
+  Event.observe(window, 'load', fireContentLoadedEvent);
+})(this);
+
+
+Element.addMethods();
+/*------------------------------- DEPRECATED -------------------------------*/
+
+Hash.toQueryString = Object.toQueryString;
+
+var Toggle = { display: Element.toggle };
+
+Element.Methods.childOf = Element.Methods.descendantOf;
+
+var Insertion = {
+  Before: function(element, content) {
+    return Element.insert(element, {before:content});
+  },
+
+  Top: function(element, content) {
+    return Element.insert(element, {top:content});
+  },
+
+  Bottom: function(element, content) {
+    return Element.insert(element, {bottom:content});
+  },
+
+  After: function(element, content) {
+    return Element.insert(element, {after:content});
+  }
+};
+
+var $continue = new Error('"throw $continue" is deprecated, use "return" instead');
+
+var Position = {
+  includeScrollOffsets: false,
+
+  prepare: function() {
+    this.deltaX =  window.pageXOffset
+                || document.documentElement.scrollLeft
+                || document.body.scrollLeft
+                || 0;
+    this.deltaY =  window.pageYOffset
+                || document.documentElement.scrollTop
+                || document.body.scrollTop
+                || 0;
+  },
+
+  within: function(element, x, y) {
+    if (this.includeScrollOffsets)
+      return this.withinIncludingScrolloffsets(element, x, y);
+    this.xcomp = x;
+    this.ycomp = y;
+    this.offset = Element.cumulativeOffset(element);
+
+    return (y >= this.offset[1] &&
+            y <  this.offset[1] + element.offsetHeight &&
+            x >= this.offset[0] &&
+            x <  this.offset[0] + element.offsetWidth);
+  },
+
+  withinIncludingScrolloffsets: function(element, x, y) {
+    var offsetcache = Element.cumulativeScrollOffset(element);
+
+    this.xcomp = x + offsetcache[0] - this.deltaX;
+    this.ycomp = y + offsetcache[1] - this.deltaY;
+    this.offset = Element.cumulativeOffset(element);
+
+    return (this.ycomp >= this.offset[1] &&
+            this.ycomp <  this.offset[1] + element.offsetHeight &&
+            this.xcomp >= this.offset[0] &&
+            this.xcomp <  this.offset[0] + element.offsetWidth);
+  },
+
+  overlap: function(mode, element) {
+    if (!mode) return 0;
+    if (mode == 'vertical')
+      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
+        element.offsetHeight;
+    if (mode == 'horizontal')
+      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
+        element.offsetWidth;
+  },
+
+
+  cumulativeOffset: Element.Methods.cumulativeOffset,
+
+  positionedOffset: Element.Methods.positionedOffset,
+
+  absolutize: function(element) {
+    Position.prepare();
+    return Element.absolutize(element);
+  },
+
+  relativize: function(element) {
+    Position.prepare();
+    return Element.relativize(element);
+  },
+
+  realOffset: Element.Methods.cumulativeScrollOffset,
+
+  offsetParent: Element.Methods.getOffsetParent,
+
+  page: Element.Methods.viewportOffset,
+
+  clone: function(source, target, options) {
+    options = options || { };
+    return Element.clonePosition(target, source, options);
+  }
+};
+
+/*--------------------------------------------------------------------------*/
+
+if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
+  function iter(name) {
+    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
+  }
+
+  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
+  function(element, className) {
+    className = className.toString().strip();
+    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
+    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
+  } : function(element, className) {
+    className = className.toString().strip();
+    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
+    if (!classNames && !className) return elements;
+
+    var nodes = $(element).getElementsByTagName('*');
+    className = ' ' + className + ' ';
+
+    for (var i = 0, child, cn; child = nodes[i]; i++) {
+      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
+          (classNames && classNames.all(function(name) {
+            return !name.toString().blank() && cn.include(' ' + name + ' ');
+          }))))
+        elements.push(Element.extend(child));
+    }
+    return elements;
+  };
+
+  return function(className, parentElement) {
+    return $(parentElement || document.body).getElementsByClassName(className);
+  };
+}(Element.Methods);
+
+/*--------------------------------------------------------------------------*/
+
+Element.ClassNames = Class.create();
+Element.ClassNames.prototype = {
+  initialize: function(element) {
+    this.element = $(element);
+  },
+
+  _each: function(iterator, context) {
+    this.element.className.split(/\s+/).select(function(name) {
+      return name.length > 0;
+    })._each(iterator, context);
+  },
+
+  set: function(className) {
+    this.element.className = className;
+  },
+
+  add: function(classNameToAdd) {
+    if (this.include(classNameToAdd)) return;
+    this.set($A(this).concat(classNameToAdd).join(' '));
+  },
+
+  remove: function(classNameToRemove) {
+    if (!this.include(classNameToRemove)) return;
+    this.set($A(this).without(classNameToRemove).join(' '));
+  },
+
+  toString: function() {
+    return $A(this).join(' ');
+  }
+};
+
+Object.extend(Element.ClassNames.prototype, Enumerable);
+
+/*--------------------------------------------------------------------------*/
+
+(function() {
+  window.Selector = Class.create({
+    initialize: function(expression) {
+      this.expression = expression.strip();
+    },
+
+    findElements: function(rootElement) {
+      return Prototype.Selector.select(this.expression, rootElement);
+    },
+
+    match: function(element) {
+      return Prototype.Selector.match(element, this.expression);
+    },
+
+    toString: function() {
+      return this.expression;
+    },
+
+    inspect: function() {
+      return "#<Selector: " + this.expression + ">";
+    }
+  });
+
+  Object.extend(Selector, {
+    matchElements: function(elements, expression) {
+      var match = Prototype.Selector.match,
+          results = [];
+
+      for (var i = 0, length = elements.length; i < length; i++) {
+        var element = elements[i];
+        if (match(element, expression)) {
+          results.push(Element.extend(element));
+        }
+      }
+      return results;
+    },
+
+    findElement: function(elements, expression, index) {
+      index = index || 0;
+      var matchIndex = 0, element;
+      for (var i = 0, length = elements.length; i < length; i++) {
+        element = elements[i];
+        if (Prototype.Selector.match(element, expression) && index === matchIndex++) {
+          return Element.extend(element);
+        }
+      }
+    },
+
+    findChildElements: function(element, expressions) {
+      var selector = expressions.toArray().join(', ');
+      return Prototype.Selector.select(selector, element || document);
+    }
+  });
+})();