/*
---

script: Core.js

description: The core of MooTools, contains all the base functions and the Native and Hash implementations. Required by all the other scripts.

license: MIT-style license.

copyright: Copyright (c) 2006-2008 [Valerio Proietti](http://mad4milk.net/).

authors: The MooTools production team (http://mootools.net/developers/)

inspiration:
- Class implementation inspired by [Base.js](http://dean.edwards.name/weblog/2006/03/base/) Copyright (c) 2006 Dean Edwards, [GNU Lesser General Public License](http://opensource.org/licenses/lgpl-license.php)
- Some functionality inspired by [Prototype.js](http://prototypejs.org) Copyright (c) 2005-2007 Sam Stephenson, [MIT License](http://opensource.org/licenses/mit-license.php)

provides: [Mootools, Native, Hash.base, Array.each, $util]

...
*/

var MooTools = {
  'version': '1.2.4',
  'build': '0d9113241a90b9cd5643b926795852a2026710d4'
};

var Native = function(options)
{
  options = options || {};
  var name = options.name;
  var legacy = options.legacy;
  var protect = options.protect;
  var methods = options.implement;
  var generics = options.generics;
  var initialize = options.initialize;
  var afterImplement = options.afterImplement || function() { };
  var object = initialize || legacy;
  generics = generics !== false;

  object.constructor = Native;
  object.$family = { name: 'native' };
  if (legacy && initialize) object.prototype = legacy.prototype;
  object.prototype.constructor = object;

  if (name)
  {
    var family = name.toLowerCase();
    object.prototype.$family = { name: family };
    Native.typize(object, family);
  }

  var add = function(obj, name, method, force)
  {
    if (!protect || force || !obj.prototype[name]) obj.prototype[name] = method;
    if (generics) Native.genericize(obj, name, protect);
    afterImplement.call(obj, name, method);
    return obj;
  };

  object.alias = function(a1, a2, a3)
  {
    if (typeof a1 == 'string')
    {
      var pa1 = this.prototype[a1];
      if ((a1 = pa1)) return add(this, a2, a1, a3);
    }
    for (var a in a1) this.alias(a, a1[a], a2);
    return this;
  };

  object.implement = function(a1, a2, a3)
  {
    if (typeof a1 == 'string') return add(this, a1, a2, a3);
    for (var p in a1) add(this, p, a1[p], a2);
    return this;
  };

  if (methods) object.implement(methods);

  return object;
};

Native.genericize = function(object, property, check)
{
  if ((!check || !object[property]) && typeof object.prototype[property] == 'function') object[property] = function()
  {
    var args = Array.prototype.slice.call(arguments);
    return object.prototype[property].apply(args.shift(), args);
  };
};

Native.implement = function(objects, properties)
{
  for (var i = 0, l = objects.length; i < l; i++) objects[i].implement(properties);
};

Native.typize = function(object, family)
{
  if (!object.type) object.type = function(item)
  {
    return ($type(item) === family);
  };
};

(function()
{
  var natives = { 'Array': Array, 'Date': Date, 'Function': Function, 'Number': Number, 'RegExp': RegExp, 'String': String };
  for (var n in natives) new Native({ name: n, initialize: natives[n], protect: true });

  var types = { 'boolean': Boolean, 'native': Native, 'object': Object };
  for (var t in types) Native.typize(types[t], t);

  var generics = {
    'Array': ["concat", "indexOf", "join", "lastIndexOf", "pop", "push", "reverse", "shift", "slice", "sort", "splice", "toString", "unshift", "valueOf"],
    'String': ["charAt", "charCodeAt", "concat", "indexOf", "lastIndexOf", "match", "replace", "search", "slice", "split", "substr", "substring", "toLowerCase", "toUpperCase", "valueOf"]
  };
  for (var g in generics)
  {
    for (var i = generics[g].length; i--; ) Native.genericize(natives[g], generics[g][i], true);
  }
})();

var Hash = new Native({

  name: 'Hash',

  initialize: function(object)
  {
    if ($type(object) == 'hash') object = $unlink(object.getClean());
    for (var key in object) this[key] = object[key];
    return this;
  }

});

Hash.implement({

  forEach: function(fn, bind)
  {
    for (var key in this)
    {
      if (this.hasOwnProperty(key)) fn.call(bind, this[key], key, this);
    }
  },

  getClean: function()
  {
    var clean = {};
    for (var key in this)
    {
      if (this.hasOwnProperty(key)) clean[key] = this[key];
    }
    return clean;
  },

  getLength: function()
  {
    var length = 0;
    for (var key in this)
    {
      if (this.hasOwnProperty(key)) length++;
    }
    return length;
  }

});

Hash.alias('forEach', 'each');

Array.implement({

  forEach: function(fn, bind)
  {
    for (var i = 0, l = this.length; i < l; i++) fn.call(bind, this[i], i, this);
  }

});

Array.alias('forEach', 'each');

function $A(iterable)
{
  if (iterable.item)
  {
    var l = iterable.length, array = new Array(l);
    while (l--) array[l] = iterable[l];
    return array;
  }
  return Array.prototype.slice.call(iterable);
};

function $arguments(i)
{
  return function()
  {
    return arguments[i];
  };
};

function $chk(obj)
{
  return !!(obj || obj === 0);
};

function $clear(timer)
{
  clearTimeout(timer);
  clearInterval(timer);
  return null;
};

function $defined(obj)
{
  return (obj != undefined);
};

function $each(iterable, fn, bind)
{
  var type = $type(iterable);
  ((type == 'arguments' || type == 'collection' || type == 'array') ? Array : Hash).each(iterable, fn, bind);
};

function $empty() { };

function $extend(original, extended)
{
  for (var key in (extended || {})) original[key] = extended[key];
  return original;
};

function $H(object)
{
  return new Hash(object);
};

function $lambda(value)
{
  return ($type(value) == 'function') ? value : function()
  {
    return value;
  };
};

function $merge()
{
  var args = Array.slice(arguments);
  args.unshift({});
  return $mixin.apply(null, args);
};

function $mixin(mix)
{
  for (var i = 1, l = arguments.length; i < l; i++)
  {
    var object = arguments[i];
    if ($type(object) != 'object') continue;
    for (var key in object)
    {
      var op = object[key], mp = mix[key];
      mix[key] = (mp && $type(op) == 'object' && $type(mp) == 'object') ? $mixin(mp, op) : $unlink(op);
    }
  }
  return mix;
};

function $pick()
{
  for (var i = 0, l = arguments.length; i < l; i++)
  {
    if (arguments[i] != undefined) return arguments[i];
  }
  return null;
};

function $random(min, max)
{
  return Math.floor(Math.random() * (max - min + 1) + min);
};

function $splat(obj)
{
  var type = $type(obj);
  return (type) ? ((type != 'array' && type != 'arguments') ? [obj] : obj) : [];
};

var $time = Date.now || function()
{
  return +new Date;
};

function $try()
{
  for (var i = 0, l = arguments.length; i < l; i++)
  {
    try
    {
      return arguments[i]();
    } catch (e) { }
  }
  return null;
};

function $type(obj)
{
  if (obj == undefined) return false;
  if (obj.$family) return (obj.$family.name == 'number' && !isFinite(obj)) ? false : obj.$family.name;
  if (obj.nodeName)
  {
    switch (obj.nodeType)
    {
      case 1: return 'element';
      case 3: return (/\S/).test(obj.nodeValue) ? 'textnode' : 'whitespace';
    }
  } else if (typeof obj.length == 'number')
  {
    if (obj.callee) return 'arguments';
    else if (obj.item) return 'collection';
  }
  return typeof obj;
};

function $unlink(object)
{
  var unlinked;
  switch ($type(object))
  {
    case 'object':
      unlinked = {};
      for (var p in object) unlinked[p] = $unlink(object[p]);
      break;
    case 'hash':
      unlinked = new Hash(object);
      break;
    case 'array':
      unlinked = [];
      for (var i = 0, l = object.length; i < l; i++) unlinked[i] = $unlink(object[i]);
      break;
    default: return object;
  }
  return unlinked;
};


/*
---

script: Browser.js

description: The Browser Core. Contains Browser initialization, Window and Document, and the Browser Hash.

license: MIT-style license.

requires: 
- /Native
- /$util

provides: [Browser, Window, Document, $exec]

...
*/

var Browser = $merge({

  Engine: { name: 'unknown', version: 0 },

  Platform: { name: (window.orientation != undefined) ? 'ipod' : (navigator.platform.match(/mac|win|linux/i) || ['other'])[0].toLowerCase() },

  Features: { xpath: !!(document.evaluate), air: !!(window.runtime), query: !!(document.querySelector) },

  Plugins: {},

  Engines: {

    presto: function()
    {
      return (!window.opera) ? false : ((arguments.callee.caller) ? 960 : ((document.getElementsByClassName) ? 950 : 925));
    },

    trident: function()
    {
      return (!window.ActiveXObject) ? false : ((window.XMLHttpRequest) ? ((document.querySelectorAll) ? 6 : 5) : 4);
    },

    webkit: function()
    {
      return (navigator.taintEnabled) ? false : ((Browser.Features.xpath) ? ((Browser.Features.query) ? 525 : 420) : 419);
    },

    gecko: function()
    {
      return (!document.getBoxObjectFor && window.mozInnerScreenX == null) ? false : ((document.getElementsByClassName) ? 19 : 18);
    }

  }

}, Browser || {});

Browser.Platform[Browser.Platform.name] = true;

Browser.detect = function()
{

  for (var engine in this.Engines)
  {
    var version = this.Engines[engine]();
    if (version)
    {
      this.Engine = { name: engine, version: version };
      this.Engine[engine] = this.Engine[engine + version] = true;
      break;
    }
  }

  return { name: engine, version: version };

};

Browser.detect();

Browser.Request = function()
{
  return $try(function()
  {
    return new XMLHttpRequest();
  }, function()
  {
    return new ActiveXObject('MSXML2.XMLHTTP');
  }, function()
  {
    return new ActiveXObject('Microsoft.XMLHTTP');
  });
};

Browser.Features.xhr = !!(Browser.Request());

Browser.Plugins.Flash = (function()
{
  var version = ($try(function()
  {
    return navigator.plugins['Shockwave Flash'].description;
  }, function()
  {
    return new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version');
  }) || '0 r0').match(/\d+/g);
  return { version: parseInt(version[0] || 0 + '.' + version[1], 10) || 0, build: parseInt(version[2], 10) || 0 };
})();

function $exec(text)
{
  if (!text) return text;
  if (window.execScript)
  {
    window.execScript(text);
  } else
  {
    var script = document.createElement('script');
    script.setAttribute('type', 'text/javascript');
    script[(Browser.Engine.webkit && Browser.Engine.version < 420) ? 'innerText' : 'text'] = text;
    document.head.appendChild(script);
    document.head.removeChild(script);
  }
  return text;
};

Native.UID = 1;

var $uid = (Browser.Engine.trident) ? function(item)
{
  return (item.uid || (item.uid = [Native.UID++]))[0];
} : function(item)
{
  return item.uid || (item.uid = Native.UID++);
};

var Window = new Native({

  name: 'Window',

  legacy: (Browser.Engine.trident) ? null : window.Window,

  initialize: function(win)
  {
    $uid(win);
    if (!win.Element)
    {
      win.Element = $empty;
      if (Browser.Engine.webkit) win.document.createElement("iframe"); //fixes safari 2
      win.Element.prototype = (Browser.Engine.webkit) ? window["[[DOMElement.prototype]]"] : {};
    }
    win.document.window = win;
    return $extend(win, Window.Prototype);
  },

  afterImplement: function(property, value)
  {
    window[property] = Window.Prototype[property] = value;
  }

});

Window.Prototype = { $family: { name: 'window'} };

new Window(window);

var Document = new Native({

  name: 'Document',

  legacy: (Browser.Engine.trident) ? null : window.Document,

  initialize: function(doc)
  {
    $uid(doc);
    doc.head = doc.getElementsByTagName('head')[0];
    doc.html = doc.getElementsByTagName('html')[0];
    if (Browser.Engine.trident && Browser.Engine.version <= 4) $try(function()
    {
      doc.execCommand("BackgroundImageCache", false, true);
    });
    if (Browser.Engine.trident) doc.window.attachEvent('onunload', function()
    {
      doc.window.detachEvent('onunload', arguments.callee);
      doc.head = doc.html = doc.window = null;
    });
    return $extend(doc, Document.Prototype);
  },

  afterImplement: function(property, value)
  {
    document[property] = Document.Prototype[property] = value;
  }

});

Document.Prototype = { $family: { name: 'document'} };

new Document(document);


/*
---

script: Array.js

description: Contains Array Prototypes like each, contains, and erase.

license: MIT-style license.

requires:
- /$util
- /Array.each

provides: [Array]

...
*/

Array.implement({

  every: function(fn, bind)
  {
    for (var i = 0, l = this.length; i < l; i++)
    {
      if (!fn.call(bind, this[i], i, this)) return false;
    }
    return true;
  },

  filter: function(fn, bind)
  {
    var results = [];
    for (var i = 0, l = this.length; i < l; i++)
    {
      if (fn.call(bind, this[i], i, this)) results.push(this[i]);
    }
    return results;
  },

  clean: function()
  {
    return this.filter($defined);
  },

  indexOf: function(item, from)
  {
    var len = this.length;
    for (var i = (from < 0) ? Math.max(0, len + from) : from || 0; i < len; i++)
    {
      if (this[i] === item) return i;
    }
    return -1;
  },

  map: function(fn, bind)
  {
    var results = [];
    for (var i = 0, l = this.length; i < l; i++) results[i] = fn.call(bind, this[i], i, this);
    return results;
  },

  some: function(fn, bind)
  {
    for (var i = 0, l = this.length; i < l; i++)
    {
      if (fn.call(bind, this[i], i, this)) return true;
    }
    return false;
  },

  associate: function(keys)
  {
    var obj = {}, length = Math.min(this.length, keys.length);
    for (var i = 0; i < length; i++) obj[keys[i]] = this[i];
    return obj;
  },

  link: function(object)
  {
    var result = {};
    for (var i = 0, l = this.length; i < l; i++)
    {
      for (var key in object)
      {
        if (object[key](this[i]))
        {
          result[key] = this[i];
          delete object[key];
          break;
        }
      }
    }
    return result;
  },

  contains: function(item, from)
  {
    return this.indexOf(item, from) != -1;
  },

  extend: function(array)
  {
    for (var i = 0, j = array.length; i < j; i++) this.push(array[i]);
    return this;
  },

  getLast: function()
  {
    return (this.length) ? this[this.length - 1] : null;
  },

  getRandom: function()
  {
    return (this.length) ? this[$random(0, this.length - 1)] : null;
  },

  include: function(item)
  {
    if (!this.contains(item)) this.push(item);
    return this;
  },

  combine: function(array)
  {
    for (var i = 0, l = array.length; i < l; i++) this.include(array[i]);
    return this;
  },

  erase: function(item)
  {
    for (var i = this.length; i--; i)
    {
      if (this[i] === item) this.splice(i, 1);
    }
    return this;
  },

  empty: function()
  {
    this.length = 0;
    return this;
  },

  flatten: function()
  {
    var array = [];
    for (var i = 0, l = this.length; i < l; i++)
    {
      var type = $type(this[i]);
      if (!type) continue;
      array = array.concat((type == 'array' || type == 'collection' || type == 'arguments') ? Array.flatten(this[i]) : this[i]);
    }
    return array;
  },

  hexToRgb: function(array)
  {
    if (this.length != 3) return null;
    var rgb = this.map(function(value)
    {
      if (value.length == 1) value += value;
      return value.toInt(16);
    });
    return (array) ? rgb : 'rgb(' + rgb + ')';
  },

  rgbToHex: function(array)
  {
    if (this.length < 3) return null;
    if (this.length == 4 && this[3] == 0 && !array) return 'transparent';
    var hex = [];
    for (var i = 0; i < 3; i++)
    {
      var bit = (this[i] - 0).toString(16);
      hex.push((bit.length == 1) ? '0' + bit : bit);
    }
    return (array) ? hex : '#' + hex.join('');
  }

});


/*
---

script: Function.js

description: Contains Function Prototypes like create, bind, pass, and delay.

license: MIT-style license.

requires:
- /Native
- /$util

provides: [Function]

...
*/

Function.implement({

  extend: function(properties)
  {
    for (var property in properties) this[property] = properties[property];
    return this;
  },

  create: function(options)
  {
    var self = this;
    options = options || {};
    return function(event)
    {
      var args = options.arguments;
      args = (args != undefined) ? $splat(args) : Array.slice(arguments, (options.event) ? 1 : 0);
      if (options.event) args = [event || window.event].extend(args);
      var returns = function()
      {
        return self.apply(options.bind || null, args);
      };
      if (options.delay) return setTimeout(returns, options.delay);
      if (options.periodical) return setInterval(returns, options.periodical);
      if (options.attempt) return $try(returns);
      return returns();
    };
  },

  run: function(args, bind)
  {
    return this.apply(bind, $splat(args));
  },

  pass: function(args, bind)
  {
    return this.create({ bind: bind, arguments: args });
  },

  bind: function(bind, args)
  {
    return this.create({ bind: bind, arguments: args });
  },

  bindWithEvent: function(bind, args)
  {
    return this.create({ bind: bind, arguments: args, event: true });
  },

  attempt: function(args, bind)
  {
    return this.create({ bind: bind, arguments: args, attempt: true })();
  },

  delay: function(delay, bind, args)
  {
    return this.create({ bind: bind, arguments: args, delay: delay })();
  },

  periodical: function(periodical, bind, args)
  {
    return this.create({ bind: bind, arguments: args, periodical: periodical })();
  }

});


/*
---

script: Number.js

description: Contains Number Prototypes like limit, round, times, and ceil.

license: MIT-style license.

requires:
- /Native
- /$util

provides: [Number]

...
*/

Number.implement({

  limit: function(min, max)
  {
    return Math.min(max, Math.max(min, this));
  },

  round: function(precision)
  {
    precision = Math.pow(10, precision || 0);
    return Math.round(this * precision) / precision;
  },

  times: function(fn, bind)
  {
    for (var i = 0; i < this; i++) fn.call(bind, i, this);
  },

  toFloat: function()
  {
    return parseFloat(this);
  },

  toInt: function(base)
  {
    return parseInt(this, base || 10);
  }

});

Number.alias('times', 'each');

(function(math)
{
  var methods = {};
  math.each(function(name)
  {
    if (!Number[name]) methods[name] = function()
    {
      return Math[name].apply(null, [this].concat($A(arguments)));
    };
  });
  Number.implement(methods);
})(['abs', 'acos', 'asin', 'atan', 'atan2', 'ceil', 'cos', 'exp', 'floor', 'log', 'max', 'min', 'pow', 'sin', 'sqrt', 'tan']);


/*
---

script: String.js

description: Contains String Prototypes like camelCase, capitalize, test, and toInt.

license: MIT-style license.

requires:
- /Native

provides: [String]

...
*/

String.implement({

  test: function(regex, params)
  {
    return ((typeof regex == 'string') ? new RegExp(regex, params) : regex).test(this);
  },

  contains: function(string, separator)
  {
    return (separator) ? (separator + this + separator).indexOf(separator + string + separator) > -1 : this.indexOf(string) > -1;
  },

  trim: function()
  {
    return this.replace(/^\s+|\s+$/g, '');
  },

  clean: function()
  {
    return this.replace(/\s+/g, ' ').trim();
  },

  camelCase: function()
  {
    return this.replace(/-\D/g, function(match)
    {
      return match.charAt(1).toUpperCase();
    });
  },

  hyphenate: function()
  {
    return this.replace(/[A-Z]/g, function(match)
    {
      return ('-' + match.charAt(0).toLowerCase());
    });
  },

  capitalize: function()
  {
    return this.replace(/\b[a-z]/g, function(match)
    {
      return match.toUpperCase();
    });
  },

  escapeRegExp: function()
  {
    return this.replace(/([-.*+?^${}()|[\]\/\\])/g, '\\$1');
  },

  toInt: function(base)
  {
    return parseInt(this, base || 10);
  },

  toFloat: function()
  {
    return parseFloat(this);
  },

  hexToRgb: function(array)
  {
    var hex = this.match(/^#?(\w{1,2})(\w{1,2})(\w{1,2})$/);
    return (hex) ? hex.slice(1).hexToRgb(array) : null;
  },

  rgbToHex: function(array)
  {
    var rgb = this.match(/\d{1,3}/g);
    return (rgb) ? rgb.rgbToHex(array) : null;
  },

  stripScripts: function(option)
  {
    var scripts = '';
    var text = this.replace(/<script[^>]*>([\s\S]*?)<\/script>/gi, function()
    {
      scripts += arguments[1] + '\n';
      return '';
    });
    if (option === true) $exec(scripts);
    else if ($type(option) == 'function') option(scripts, text);
    return text;
  },

  substitute: function(object, regexp)
  {
    return this.replace(regexp || (/\\?\{([^{}]+)\}/g), function(match, name)
    {
      if (match.charAt(0) == '\\') return match.slice(1);
      return (object[name] != undefined) ? object[name] : '';
    });
  }

});


/*
---

script: Hash.js

description: Contains Hash Prototypes. Provides a means for overcoming the JavaScript practical impossibility of extending native Objects.

license: MIT-style license.

requires:
- /Hash.base

provides: [Hash]

...
*/

Hash.implement({

  has: Object.prototype.hasOwnProperty,

  keyOf: function(value)
  {
    for (var key in this)
    {
      if (this.hasOwnProperty(key) && this[key] === value) return key;
    }
    return null;
  },

  hasValue: function(value)
  {
    return (Hash.keyOf(this, value) !== null);
  },

  extend: function(properties)
  {
    Hash.each(properties || {}, function(value, key)
    {
      Hash.set(this, key, value);
    }, this);
    return this;
  },

  combine: function(properties)
  {
    Hash.each(properties || {}, function(value, key)
    {
      Hash.include(this, key, value);
    }, this);
    return this;
  },

  erase: function(key)
  {
    if (this.hasOwnProperty(key)) delete this[key];
    return this;
  },

  get: function(key)
  {
    return (this.hasOwnProperty(key)) ? this[key] : null;
  },

  set: function(key, value)
  {
    if (!this[key] || this.hasOwnProperty(key)) this[key] = value;
    return this;
  },

  empty: function()
  {
    Hash.each(this, function(value, key)
    {
      delete this[key];
    }, this);
    return this;
  },

  include: function(key, value)
  {
    if (this[key] == undefined) this[key] = value;
    return this;
  },

  map: function(fn, bind)
  {
    var results = new Hash;
    Hash.each(this, function(value, key)
    {
      results.set(key, fn.call(bind, value, key, this));
    }, this);
    return results;
  },

  filter: function(fn, bind)
  {
    var results = new Hash;
    Hash.each(this, function(value, key)
    {
      if (fn.call(bind, value, key, this)) results.set(key, value);
    }, this);
    return results;
  },

  every: function(fn, bind)
  {
    for (var key in this)
    {
      if (this.hasOwnProperty(key) && !fn.call(bind, this[key], key)) return false;
    }
    return true;
  },

  some: function(fn, bind)
  {
    for (var key in this)
    {
      if (this.hasOwnProperty(key) && fn.call(bind, this[key], key)) return true;
    }
    return false;
  },

  getKeys: function()
  {
    var keys = [];
    Hash.each(this, function(value, key)
    {
      keys.push(key);
    });
    return keys;
  },

  getValues: function()
  {
    var values = [];
    Hash.each(this, function(value)
    {
      values.push(value);
    });
    return values;
  },

  toQueryString: function(base)
  {
    var queryString = [];
    Hash.each(this, function(value, key)
    {
      if (base) key = base + '[' + key + ']';
      var result;
      switch ($type(value))
      {
        case 'object': result = Hash.toQueryString(value, key); break;
        case 'array':
          var qs = {};
          value.each(function(val, i)
          {
            qs[i] = val;
          });
          result = Hash.toQueryString(qs, key);
          break;
        default: result = key + '=' + encodeURIComponent(value);
      }
      if (value != undefined) queryString.push(result);
    });

    return queryString.join('&');
  }

});

Hash.alias({ keyOf: 'indexOf', hasValue: 'contains' });


/*
---

script: Event.js

description: Contains the Event Class, to make the event object cross-browser.

license: MIT-style license.

requires:
- /Window
- /Document
- /Hash
- /Array
- /Function
- /String

provides: [Event]

...
*/

var Event = new Native({

  name: 'Event',

  initialize: function(event, win)
  {
    win = win || window;
    var doc = win.document;
    event = event || win.event;
    if (event.$extended) return event;
    this.$extended = true;
    var type = event.type;
    var target = event.target || event.srcElement;
    while (target && target.nodeType == 3) target = target.parentNode;

    if (type.test(/key/))
    {
      var code = event.which || event.keyCode;
      var key = Event.Keys.keyOf(code);
      if (type == 'keydown')
      {
        var fKey = code - 111;
        if (fKey > 0 && fKey < 13) key = 'f' + fKey;
      }
      key = key || String.fromCharCode(code).toLowerCase();
    } else if (type.match(/(click|mouse|menu)/i))
    {
      doc = (!doc.compatMode || doc.compatMode == 'CSS1Compat') ? doc.html : doc.body;
      var page = {
        x: event.pageX || event.clientX + doc.scrollLeft,
        y: event.pageY || event.clientY + doc.scrollTop
      };
      var client = {
        x: (event.pageX) ? event.pageX - win.pageXOffset : event.clientX,
        y: (event.pageY) ? event.pageY - win.pageYOffset : event.clientY
      };
      if (type.match(/DOMMouseScroll|mousewheel/))
      {
        var wheel = (event.wheelDelta) ? event.wheelDelta / 120 : -(event.detail || 0) / 3;
      }
      var rightClick = (event.which == 3) || (event.button == 2);
      var related = null;
      if (type.match(/over|out/))
      {
        switch (type)
        {
          case 'mouseover': related = event.relatedTarget || event.fromElement; break;
          case 'mouseout': related = event.relatedTarget || event.toElement;
        }
        if (!(function()
        {
          while (related && related.nodeType == 3) related = related.parentNode;
          return true;
        }).create({ attempt: Browser.Engine.gecko })()) related = false;
      }
    }

    return $extend(this, {
      event: event,
      type: type,

      page: page,
      client: client,
      rightClick: rightClick,

      wheel: wheel,

      relatedTarget: related,
      target: target,

      code: code,
      key: key,

      shift: event.shiftKey,
      control: event.ctrlKey,
      alt: event.altKey,
      meta: event.metaKey
    });
  }

});

Event.Keys = new Hash({
  'enter': 13,
  'up': 38,
  'down': 40,
  'left': 37,
  'right': 39,
  'esc': 27,
  'space': 32,
  'backspace': 8,
  'tab': 9,
  'delete': 46
});

Event.implement({

  stop: function()
  {
    return this.stopPropagation().preventDefault();
  },

  stopPropagation: function()
  {
    if (this.event.stopPropagation) this.event.stopPropagation();
    else this.event.cancelBubble = true;
    return this;
  },

  preventDefault: function()
  {
    if (this.event.preventDefault) this.event.preventDefault();
    else this.event.returnValue = false;
    return this;
  }

});


/*
---

script: Class.js

description: Contains the Class Function for easily creating, extending, and implementing reusable Classes.

license: MIT-style license.

requires:
- /$util
- /Native
- /Array
- /String
- /Function
- /Number
- /Hash

provides: [Class]

...
*/

function Class(params)
{

  if (params instanceof Function) params = { initialize: params };

  var newClass = function()
  {
    Object.reset(this);
    if (newClass._prototyping) return this;
    this._current = $empty;
    var value = (this.initialize) ? this.initialize.apply(this, arguments) : this;
    delete this._current; delete this.caller;
    return value;
  } .extend(this);

  newClass.implement(params);

  newClass.constructor = Class;
  newClass.prototype.constructor = newClass;

  return newClass;

};

Function.prototype.protect = function()
{
  this._protected = true;
  return this;
};

Object.reset = function(object, key)
{

  if (key == null)
  {
    for (var p in object) Object.reset(object, p);
    return object;
  }

  delete object[key];

  switch ($type(object[key]))
  {
    case 'object':
      var F = function() { };
      F.prototype = object[key];
      var i = new F;
      object[key] = Object.reset(i);
      break;
    case 'array': object[key] = $unlink(object[key]); break;
  }

  return object;

};

new Native({ name: 'Class', initialize: Class }).extend({

  instantiate: function(F)
  {
    F._prototyping = true;
    var proto = new F;
    delete F._prototyping;
    return proto;
  },

  wrap: function(self, key, method)
  {
    if (method._origin) method = method._origin;

    return function()
    {
      if (method._protected && this._current == null) throw new Error('The method "' + key + '" cannot be called.');
      var caller = this.caller, current = this._current;
      this.caller = current; this._current = arguments.callee;
      var result = method.apply(this, arguments);
      this._current = current; this.caller = caller;
      return result;
    } .extend({ _owner: self, _origin: method, _name: key });

  }

});

Class.implement({

  implement: function(key, value)
  {

    if ($type(key) == 'object')
    {
      for (var p in key) this.implement(p, key[p]);
      return this;
    }

    var mutator = Class.Mutators[key];

    if (mutator)
    {
      value = mutator.call(this, value);
      if (value == null) return this;
    }

    var proto = this.prototype;

    switch ($type(value))
    {

      case 'function':
        if (value._hidden) return this;
        proto[key] = Class.wrap(this, key, value);
        break;

      case 'object':
        var previous = proto[key];
        if ($type(previous) == 'object') $mixin(previous, value);
        else proto[key] = $unlink(value);
        break;

      case 'array':
        proto[key] = $unlink(value);
        break;

      default: proto[key] = value;

    }

    return this;

  }

});

Class.Mutators = {

  Extends: function(parent)
  {

    this.parent = parent;
    this.prototype = Class.instantiate(parent);

    this.implement('parent', function()
    {
      var name = this.caller._name, previous = this.caller._owner.parent.prototype[name];
      if (!previous) throw new Error('The method "' + name + '" has no parent.');
      return previous.apply(this, arguments);
    } .protect());

  },

  Implements: function(items)
  {
    $splat(items).each(function(item)
    {
      if (item instanceof Function) item = Class.instantiate(item);
      this.implement(item);
    }, this);

  }

};


/*
---

script: Class.Extras.js

description: Contains Utility Classes that can be implemented into your own Classes to ease the execution of many common tasks.

license: MIT-style license.

requires:
- /Class

provides: [Chain, Events, Options]

...
*/

var Chain = new Class({

  $chain: [],

  chain: function()
  {
    this.$chain.extend(Array.flatten(arguments));
    return this;
  },

  callChain: function()
  {
    return (this.$chain.length) ? this.$chain.shift().apply(this, arguments) : false;
  },

  clearChain: function()
  {
    this.$chain.empty();
    return this;
  }

});

var Events = new Class({

  $events: {},

  addEvent: function(type, fn, internal)
  {
    type = Events.removeOn(type);
    if (fn != $empty)
    {
      this.$events[type] = this.$events[type] || [];
      this.$events[type].include(fn);
      if (internal) fn.internal = true;
    }
    return this;
  },

  addEvents: function(events)
  {
    for (var type in events) this.addEvent(type, events[type]);
    return this;
  },

  fireEvent: function(type, args, delay)
  {
    type = Events.removeOn(type);
    if (!this.$events || !this.$events[type]) return this;
    this.$events[type].each(function(fn)
    {
      fn.create({ 'bind': this, 'delay': delay, 'arguments': args })();
    }, this);
    return this;
  },

  removeEvent: function(type, fn)
  {
    type = Events.removeOn(type);
    if (!this.$events[type]) return this;
    if (!fn.internal) this.$events[type].erase(fn);
    return this;
  },

  removeEvents: function(events)
  {
    var type;
    if ($type(events) == 'object')
    {
      for (type in events) this.removeEvent(type, events[type]);
      return this;
    }
    if (events) events = Events.removeOn(events);
    for (type in this.$events)
    {
      if (events && events != type) continue;
      var fns = this.$events[type];
      for (var i = fns.length; i--; i) this.removeEvent(type, fns[i]);
    }
    return this;
  }

});

Events.removeOn = function(string)
{
  return string.replace(/^on([A-Z])/, function(full, first)
  {
    return first.toLowerCase();
  });
};

var Options = new Class({

  setOptions: function()
  {
    this.options = $merge.run([this.options].extend(arguments));
    if (!this.addEvent) return this;
    for (var option in this.options)
    {
      if ($type(this.options[option]) != 'function' || !(/^on[A-Z]/).test(option)) continue;
      this.addEvent(option, this.options[option]);
      delete this.options[option];
    }
    return this;
  }

});


/*
---

script: Element.js

description: One of the most important items in MooTools. Contains the dollar function, the dollars function, and an handful of cross-browser, time-saver methods to let you easily work with HTML Elements.

license: MIT-style license.

requires:
- /Window
- /Document
- /Array
- /String
- /Function
- /Number
- /Hash

provides: [Element, Elements, $, $$, Iframe]

...
*/

var Element = new Native({

  name: 'Element',

  legacy: window.Element,

  initialize: function(tag, props)
  {
    var konstructor = Element.Constructors.get(tag);
    if (konstructor) return konstructor(props);
    if (typeof tag == 'string') return document.newElement(tag, props);
    return document.id(tag).set(props);
  },

  afterImplement: function(key, value)
  {
    Element.Prototype[key] = value;
    if (Array[key]) return;
    Elements.implement(key, function()
    {
      var items = [], elements = true;
      for (var i = 0, j = this.length; i < j; i++)
      {
        var returns = this[i][key].apply(this[i], arguments);
        items.push(returns);
        if (elements) elements = ($type(returns) == 'element');
      }
      return (elements) ? new Elements(items) : items;
    });
  }

});

Element.Prototype = { $family: { name: 'element'} };

Element.Constructors = new Hash;

var IFrame = new Native({

  name: 'IFrame',

  generics: false,

  initialize: function()
  {
    var params = Array.link(arguments, { properties: Object.type, iframe: $defined });
    var props = params.properties || {};
    var iframe = document.id(params.iframe);
    var onload = props.onload || $empty;
    delete props.onload;
    props.id = props.name = $pick(props.id, props.name, iframe ? (iframe.id || iframe.name) : 'IFrame_' + $time());
    iframe = new Element(iframe || 'iframe', props);
    var onFrameLoad = function()
    {
      var host = $try(function()
      {
        return iframe.contentWindow.location.host;
      });
      if (!host || host == window.location.host)
      {
        var win = new Window(iframe.contentWindow);
        new Document(iframe.contentWindow.document);
        $extend(win.Element.prototype, Element.Prototype);
      }
      onload.call(iframe.contentWindow, iframe.contentWindow.document);
    };
    var contentWindow = $try(function()
    {
      return iframe.contentWindow;
    });
    ((contentWindow && contentWindow.document.body) || window.frames[props.id]) ? onFrameLoad() : iframe.addListener('load', onFrameLoad);
    return iframe;
  }

});

var Elements = new Native({

  initialize: function(elements, options)
  {
    options = $extend({ ddup: true, cash: true }, options);
    elements = elements || [];
    if (options.ddup || options.cash)
    {
      var uniques = {}, returned = [];
      for (var i = 0, l = elements.length; i < l; i++)
      {
        var el = document.id(elements[i], !options.cash);
        if (options.ddup)
        {
          if (uniques[el.uid]) continue;
          uniques[el.uid] = true;
        }
        if (el) returned.push(el);
      }
      elements = returned;
    }
    return (options.cash) ? $extend(elements, this) : elements;
  }

});

Elements.implement({

  filter: function(filter, bind)
  {
    if (!filter) return this;
    return new Elements(Array.filter(this, (typeof filter == 'string') ? function(item)
    {
      return item.match(filter);
    } : filter, bind));
  }

});

Document.implement({

  newElement: function(tag, props)
  {
    if (Browser.Engine.trident && props)
    {
      ['name', 'type', 'checked'].each(function(attribute)
      {
        if (!props[attribute]) return;
        tag += ' ' + attribute + '="' + props[attribute] + '"';
        if (attribute != 'checked') delete props[attribute];
      });
      tag = '<' + tag + '>';
    }
    return document.id(this.createElement(tag)).set(props);
  },

  newTextNode: function(text)
  {
    return this.createTextNode(text);
  },

  getDocument: function()
  {
    return this;
  },

  getWindow: function()
  {
    return this.window;
  },

  id: (function()
  {

    var types = {

      string: function(id, nocash, doc)
      {
        id = doc.getElementById(id);
        return (id) ? types.element(id, nocash) : null;
      },

      element: function(el, nocash)
      {
        $uid(el);
        if (!nocash && !el.$family && !(/^object|embed$/i).test(el.tagName))
        {
          var proto = Element.Prototype;
          for (var p in proto) el[p] = proto[p];
        };
        return el;
      },

      object: function(obj, nocash, doc)
      {
        if (obj.toElement) return types.element(obj.toElement(doc), nocash);
        return null;
      }

    };

    types.textnode = types.whitespace = types.window = types.document = $arguments(0);

    return function(el, nocash, doc)
    {
      if (el && el.$family && el.uid) return el;
      var type = $type(el);
      return (types[type]) ? types[type](el, nocash, doc || document) : null;
    };

  })()

});

if (window.$ == null) Window.implement({
  $: function(el, nc)
  {
    return document.id(el, nc, this.document);
  }
});

Window.implement({

  $$: function(selector)
  {
    if (arguments.length == 1 && typeof selector == 'string') return this.document.getElements(selector);
    var elements = [];
    var args = Array.flatten(arguments);
    for (var i = 0, l = args.length; i < l; i++)
    {
      var item = args[i];
      switch ($type(item))
      {
        case 'element': elements.push(item); break;
        case 'string': elements.extend(this.document.getElements(item, true));
      }
    }
    return new Elements(elements);
  },

  getDocument: function()
  {
    return this.document;
  },

  getWindow: function()
  {
    return this;
  }

});

Native.implement([Element, Document], {

  getElement: function(selector, nocash)
  {
    return document.id(this.getElements(selector, true)[0] || null, nocash);
  },

  getElements: function(tags, nocash)
  {
    tags = tags.split(',');
    var elements = [];
    var ddup = (tags.length > 1);
    tags.each(function(tag)
    {
      var partial = this.getElementsByTagName(tag.trim());
      (ddup) ? elements.extend(partial) : elements = partial;
    }, this);
    return new Elements(elements, { ddup: ddup, cash: !nocash });
  }

});

(function()
{

  var collected = {}, storage = {};
  var props = { input: 'checked', option: 'selected', textarea: (Browser.Engine.webkit && Browser.Engine.version < 420) ? 'innerHTML' : 'value' };

  var get = function(uid)
  {
    return (storage[uid] || (storage[uid] = {}));
  };

  var clean = function(item, retain)
  {
    if (!item) return;
    var uid = item.uid;
    if (Browser.Engine.trident)
    {
      if (item.clearAttributes)
      {
        var clone = retain && item.cloneNode(false);
        item.clearAttributes();
        if (clone) item.mergeAttributes(clone);
      } else if (item.removeEvents)
      {
        item.removeEvents();
      }
      if ((/object/i).test(item.tagName))
      {
        for (var p in item)
        {
          if (typeof item[p] == 'function') item[p] = $empty;
        }
        Element.dispose(item);
      }
    }
    if (!uid) return;
    collected[uid] = storage[uid] = null;
  };

  var purge = function()
  {
    Hash.each(collected, clean);
    if (Browser.Engine.trident) $A(document.getElementsByTagName('object')).each(clean);
    if (window.CollectGarbage) CollectGarbage();
    collected = storage = null;
  };

  var walk = function(element, walk, start, match, all, nocash)
  {
    var el = element[start || walk];
    var elements = [];
    while (el)
    {
      if (el.nodeType == 1 && (!match || Element.match(el, match)))
      {
        if (!all) return document.id(el, nocash);
        elements.push(el);
      }
      el = el[walk];
    }
    return (all) ? new Elements(elements, { ddup: false, cash: !nocash }) : null;
  };

  var attributes = {
    'html': 'innerHTML',
    'class': 'className',
    'for': 'htmlFor',
    'defaultValue': 'defaultValue',
    'text': (Browser.Engine.trident || (Browser.Engine.webkit && Browser.Engine.version < 420)) ? 'innerText' : 'textContent'
  };
  var bools = ['compact', 'nowrap', 'ismap', 'declare', 'noshade', 'checked', 'disabled', 'readonly', 'multiple', 'selected', 'noresize', 'defer'];
  var camels = ['value', 'type', 'defaultValue', 'accessKey', 'cellPadding', 'cellSpacing', 'colSpan', 'frameBorder', 'maxLength', 'readOnly', 'rowSpan', 'tabIndex', 'useMap'];

  bools = bools.associate(bools);

  Hash.extend(attributes, bools);
  Hash.extend(attributes, camels.associate(camels.map(String.toLowerCase)));

  var inserters = {

    before: function(context, element)
    {
      if (element.parentNode) element.parentNode.insertBefore(context, element);
    },

    after: function(context, element)
    {
      if (!element.parentNode) return;
      var next = element.nextSibling;
      (next) ? element.parentNode.insertBefore(context, next) : element.parentNode.appendChild(context);
    },

    bottom: function(context, element)
    {
      element.appendChild(context);
    },

    top: function(context, element)
    {
      var first = element.firstChild;
      (first) ? element.insertBefore(context, first) : element.appendChild(context);
    }

  };

  inserters.inside = inserters.bottom;

  Hash.each(inserters, function(inserter, where)
  {

    where = where.capitalize();

    Element.implement('inject' + where, function(el)
    {
      inserter(this, document.id(el, true));
      return this;
    });

    Element.implement('grab' + where, function(el)
    {
      inserter(document.id(el, true), this);
      return this;
    });

  });

  Element.implement({

    set: function(prop, value)
    {
      switch ($type(prop))
      {
        case 'object':
          for (var p in prop) this.set(p, prop[p]);
          break;
        case 'string':
          var property = Element.Properties.get(prop);
          (property && property.set) ? property.set.apply(this, Array.slice(arguments, 1)) : this.setProperty(prop, value);
      }
      return this;
    },

    get: function(prop)
    {
      var property = Element.Properties.get(prop);
      return (property && property.get) ? property.get.apply(this, Array.slice(arguments, 1)) : this.getProperty(prop);
    },

    erase: function(prop)
    {
      var property = Element.Properties.get(prop);
      (property && property.erase) ? property.erase.apply(this) : this.removeProperty(prop);
      return this;
    },

    setProperty: function(attribute, value)
    {
      var key = attributes[attribute];
      if (value == undefined) return this.removeProperty(attribute);
      if (key && bools[attribute]) value = !!value;
      (key) ? this[key] = value : this.setAttribute(attribute, '' + value);
      return this;
    },

    setProperties: function(attributes)
    {
      for (var attribute in attributes) this.setProperty(attribute, attributes[attribute]);
      return this;
    },

    getProperty: function(attribute)
    {
      var key = attributes[attribute];
      var value = (key) ? this[key] : this.getAttribute(attribute, 2);
      return (bools[attribute]) ? !!value : (key) ? value : value || null;
    },

    getProperties: function()
    {
      var args = $A(arguments);
      return args.map(this.getProperty, this).associate(args);
    },

    removeProperty: function(attribute)
    {
      var key = attributes[attribute];
      (key) ? this[key] = (key && bools[attribute]) ? false : '' : this.removeAttribute(attribute);
      return this;
    },

    removeProperties: function()
    {
      Array.each(arguments, this.removeProperty, this);
      return this;
    },

    hasClass: function(className)
    {
      return this.className.contains(className, ' ');
    },

    addClass: function(className)
    {
      if (!this.hasClass(className)) this.className = (this.className + ' ' + className).clean();
      return this;
    },

    removeClass: function(className)
    {
      this.className = this.className.replace(new RegExp('(^|\\s)' + className + '(?:\\s|$)'), '$1');
      return this;
    },

    toggleClass: function(className)
    {
      return this.hasClass(className) ? this.removeClass(className) : this.addClass(className);
    },

    adopt: function()
    {
      Array.flatten(arguments).each(function(element)
      {
        element = document.id(element, true);
        if (element) this.appendChild(element);
      }, this);
      return this;
    },

    appendText: function(text, where)
    {
      return this.grab(this.getDocument().newTextNode(text), where);
    },

    grab: function(el, where)
    {
      inserters[where || 'bottom'](document.id(el, true), this);
      return this;
    },

    inject: function(el, where)
    {
      inserters[where || 'bottom'](this, document.id(el, true));
      return this;
    },

    replaces: function(el)
    {
      el = document.id(el, true);
      el.parentNode.replaceChild(this, el);
      return this;
    },

    wraps: function(el, where)
    {
      el = document.id(el, true);
      return this.replaces(el).grab(el, where);
    },

    getPrevious: function(match, nocash)
    {
      return walk(this, 'previousSibling', null, match, false, nocash);
    },

    getAllPrevious: function(match, nocash)
    {
      return walk(this, 'previousSibling', null, match, true, nocash);
    },

    getNext: function(match, nocash)
    {
      return walk(this, 'nextSibling', null, match, false, nocash);
    },

    getAllNext: function(match, nocash)
    {
      return walk(this, 'nextSibling', null, match, true, nocash);
    },

    getFirst: function(match, nocash)
    {
      return walk(this, 'nextSibling', 'firstChild', match, false, nocash);
    },

    getLast: function(match, nocash)
    {
      return walk(this, 'previousSibling', 'lastChild', match, false, nocash);
    },

    getParent: function(match, nocash)
    {
      return walk(this, 'parentNode', null, match, false, nocash);
    },

    getParents: function(match, nocash)
    {
      return walk(this, 'parentNode', null, match, true, nocash);
    },

    getSiblings: function(match, nocash)
    {
      return this.getParent().getChildren(match, nocash).erase(this);
    },

    getChildren: function(match, nocash)
    {
      return walk(this, 'nextSibling', 'firstChild', match, true, nocash);
    },

    getWindow: function()
    {
      return this.ownerDocument.window;
    },

    getDocument: function()
    {
      return this.ownerDocument;
    },

    getElementById: function(id, nocash)
    {
      var el = this.ownerDocument.getElementById(id);
      if (!el) return null;
      for (var parent = el.parentNode; parent != this; parent = parent.parentNode)
      {
        if (!parent) return null;
      }
      return document.id(el, nocash);
    },

    getSelected: function()
    {
      return new Elements($A(this.options).filter(function(option)
      {
        return option.selected;
      }));
    },

    getComputedStyle: function(property)
    {
      if (this.currentStyle) return this.currentStyle[property.camelCase()];
      var computed = this.getDocument().defaultView.getComputedStyle(this, null);
      return (computed) ? computed.getPropertyValue([property.hyphenate()]) : null;
    },

    toQueryString: function()
    {
      var queryString = [];
      this.getElements('input, select, textarea', true).each(function(el)
      {
        if (!el.name || el.disabled || el.type == 'submit' || el.type == 'reset' || el.type == 'file') return;
        var value = (el.tagName.toLowerCase() == 'select') ? Element.getSelected(el).map(function(opt)
        {
          return opt.value;
        }) : ((el.type == 'radio' || el.type == 'checkbox') && !el.checked) ? null : el.value;
        $splat(value).each(function(val)
        {
          if (typeof val != 'undefined') queryString.push(el.name + '=' + encodeURIComponent(val));
        });
      });
      return queryString.join('&');
    },

    clone: function(contents, keepid)
    {
      contents = contents !== false;
      var clone = this.cloneNode(contents);
      var clean = function(node, element)
      {
        if (!keepid) node.removeAttribute('id');
        if (Browser.Engine.trident)
        {
          node.clearAttributes();
          node.mergeAttributes(element);
          node.removeAttribute('uid');
          if (node.options)
          {
            var no = node.options, eo = element.options;
            for (var j = no.length; j--; ) no[j].selected = eo[j].selected;
          }
        }
        var prop = props[element.tagName.toLowerCase()];
        if (prop && element[prop]) node[prop] = element[prop];
      };

      if (contents)
      {
        var ce = clone.getElementsByTagName('*'), te = this.getElementsByTagName('*');
        for (var i = ce.length; i--; ) clean(ce[i], te[i]);
      }

      clean(clone, this);
      return document.id(clone);
    },

    destroy: function()
    {
      Element.empty(this);
      Element.dispose(this);
      clean(this, true);
      return null;
    },

    empty: function()
    {
      $A(this.childNodes).each(function(node)
      {
        Element.destroy(node);
      });
      return this;
    },

    dispose: function()
    {
      return (this.parentNode) ? this.parentNode.removeChild(this) : this;
    },

    hasChild: function(el)
    {
      el = document.id(el, true);
      if (!el) return false;
      if (Browser.Engine.webkit && Browser.Engine.version < 420) return $A(this.getElementsByTagName(el.tagName)).contains(el);
      return (this.contains) ? (this != el && this.contains(el)) : !!(this.compareDocumentPosition(el) & 16);
    },

    match: function(tag)
    {
      return (!tag || (tag == this) || (Element.get(this, 'tag') == tag));
    }

  });

  Native.implement([Element, Window, Document], {

    addListener: function(type, fn)
    {
      if (type == 'unload')
      {
        var old = fn, self = this;
        fn = function()
        {
          self.removeListener('unload', fn);
          old();
        };
      } else
      {
        collected[this.uid] = this;
      }
      if (this.addEventListener) this.addEventListener(type, fn, false);
      else this.attachEvent('on' + type, fn);
      return this;
    },

    removeListener: function(type, fn)
    {
      if (this.removeEventListener) this.removeEventListener(type, fn, false);
      else this.detachEvent('on' + type, fn);
      return this;
    },

    retrieve: function(property, dflt)
    {
      var storage = get(this.uid), prop = storage[property];
      if (dflt != undefined && prop == undefined) prop = storage[property] = dflt;
      return $pick(prop);
    },

    store: function(property, value)
    {
      var storage = get(this.uid);
      storage[property] = value;
      return this;
    },

    eliminate: function(property)
    {
      var storage = get(this.uid);
      delete storage[property];
      return this;
    }

  });

  window.addListener('unload', purge);

})();

Element.Properties = new Hash;

Element.Properties.style = {

  set: function(style)
  {
    this.style.cssText = style;
  },

  get: function()
  {
    return this.style.cssText;
  },

  erase: function()
  {
    this.style.cssText = '';
  }

};

Element.Properties.tag = {

  get: function()
  {
    return this.tagName.toLowerCase();
  }

};

Element.Properties.html = (function()
{
  var wrapper = document.createElement('div');

  var translations = {
    table: [1, '<table>', '</table>'],
    select: [1, '<select>', '</select>'],
    tbody: [2, '<table><tbody>', '</tbody></table>'],
    tr: [3, '<table><tbody><tr>', '</tr></tbody></table>']
  };
  translations.thead = translations.tfoot = translations.tbody;

  var html = {
    set: function()
    {
      var html = Array.flatten(arguments).join('');
      var wrap = Browser.Engine.trident && translations[this.get('tag')];
      if (wrap)
      {
        var first = wrapper;
        first.innerHTML = wrap[1] + html + wrap[2];
        for (var i = wrap[0]; i--; ) first = first.firstChild;
        this.empty().adopt(first.childNodes);
      } else
      {
        this.innerHTML = html;
      }
    }
  };

  html.erase = html.set;

  return html;
})();

if (Browser.Engine.webkit && Browser.Engine.version < 420) Element.Properties.text = {
  get: function()
  {
    if (this.innerText) return this.innerText;
    var temp = this.ownerDocument.newElement('div', { html: this.innerHTML }).inject(this.ownerDocument.body);
    var text = temp.innerText;
    temp.destroy();
    return text;
  }
};


/*
---

script: Element.Event.js

description: Contains Element methods for dealing with events. This file also includes mouseenter and mouseleave custom Element Events.

license: MIT-style license.

requires: 
- /Element
- /Event

provides: [Element.Event]

...
*/

Element.Properties.events = { set: function(events)
{
  this.addEvents(events);
} 
};

Native.implement([Element, Window, Document], {

  addEvent: function(type, fn)
  {
    var events = this.retrieve('events', {});
    events[type] = events[type] || { 'keys': [], 'values': [] };
    if (events[type].keys.contains(fn)) return this;
    events[type].keys.push(fn);
    var realType = type, custom = Element.Events.get(type), condition = fn, self = this;
    if (custom)
    {
      if (custom.onAdd) custom.onAdd.call(this, fn);
      if (custom.condition)
      {
        condition = function(event)
        {
          if (custom.condition.call(this, event)) return fn.call(this, event);
          return true;
        };
      }
      realType = custom.base || realType;
    }
    var defn = function()
    {
      return fn.call(self);
    };
    var nativeEvent = Element.NativeEvents[realType];
    if (nativeEvent)
    {
      if (nativeEvent == 2)
      {
        defn = function(event)
        {
          event = new Event(event, self.getWindow());
          if (condition.call(self, event) === false) event.stop();
        };
      }
      this.addListener(realType, defn);
    }
    events[type].values.push(defn);
    return this;
  },

  removeEvent: function(type, fn)
  {
    var events = this.retrieve('events');
    if (!events || !events[type]) return this;
    var pos = events[type].keys.indexOf(fn);
    if (pos == -1) return this;
    events[type].keys.splice(pos, 1);
    var value = events[type].values.splice(pos, 1)[0];
    var custom = Element.Events.get(type);
    if (custom)
    {
      if (custom.onRemove) custom.onRemove.call(this, fn);
      type = custom.base || type;
    }
    return (Element.NativeEvents[type]) ? this.removeListener(type, value) : this;
  },

  addEvents: function(events)
  {
    for (var event in events) this.addEvent(event, events[event]);
    return this;
  },

  removeEvents: function(events)
  {
    var type;
    if ($type(events) == 'object')
    {
      for (type in events) this.removeEvent(type, events[type]);
      return this;
    }
    var attached = this.retrieve('events');
    if (!attached) return this;
    if (!events)
    {
      for (type in attached) this.removeEvents(type);
      this.eliminate('events');
    } else if (attached[events])
    {
      while (attached[events].keys[0]) this.removeEvent(events, attached[events].keys[0]);
      attached[events] = null;
    }
    return this;
  },

  fireEvent: function(type, args, delay)
  {
    var events = this.retrieve('events');
    if (!events || !events[type]) return this;
    events[type].keys.each(function(fn)
    {
      fn.create({ 'bind': this, 'delay': delay, 'arguments': args })();
    }, this);
    return this;
  },

  cloneEvents: function(from, type)
  {
    from = document.id(from);
    var fevents = from.retrieve('events');
    if (!fevents) return this;
    if (!type)
    {
      for (var evType in fevents) this.cloneEvents(from, evType);
    } else if (fevents[type])
    {
      fevents[type].keys.each(function(fn)
      {
        this.addEvent(type, fn);
      }, this);
    }
    return this;
  }

});

Element.NativeEvents = {
  click: 2, dblclick: 2, mouseup: 2, mousedown: 2, contextmenu: 2, //mouse buttons
  mousewheel: 2, DOMMouseScroll: 2, //mouse wheel
  mouseover: 2, mouseout: 2, mousemove: 2, selectstart: 2, selectend: 2, //mouse movement
  keydown: 2, keypress: 2, keyup: 2, //keyboard
  focus: 2, blur: 2, change: 2, reset: 2, select: 2, submit: 2, //form elements
  load: 1, unload: 1, beforeunload: 2, resize: 1, move: 1, DOMContentLoaded: 1, readystatechange: 1, //window
  error: 1, abort: 1, scroll: 1 //misc
};

(function()
{

  var $check = function(event)
  {
    var related = event.relatedTarget;
    if (related == undefined) return true;
    if (related === false) return false;
    return ($type(this) != 'document' && related != this && related.prefix != 'xul' && !this.hasChild(related));
  };

  Element.Events = new Hash({

    mouseenter: {
      base: 'mouseover',
      condition: $check
    },

    mouseleave: {
      base: 'mouseout',
      condition: $check
    },

    mousewheel: {
      base: (Browser.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel'
    }

  });

})();


/*
---

script: Element.Style.js

description: Contains methods for interacting with the styles of Elements in a fashionable way.

license: MIT-style license.

requires:
- /Element

provides: [Element.Style]

...
*/

Element.Properties.styles = { set: function(styles)
{
  this.setStyles(styles);
} 
};

Element.Properties.opacity = {

  set: function(opacity, novisibility)
  {
    if (!novisibility)
    {
      if (opacity == 0)
      {
        if (this.style.visibility != 'hidden') this.style.visibility = 'hidden';
      } else
      {
        if (this.style.visibility != 'visible') this.style.visibility = 'visible';
      }
    }
    if (!this.currentStyle || !this.currentStyle.hasLayout) this.style.zoom = 1;
    if (Browser.Engine.trident) this.style.filter = (opacity == 1) ? '' : 'alpha(opacity=' + opacity * 100 + ')';
    this.style.opacity = opacity;
    this.store('opacity', opacity);
  },

  get: function()
  {
    return this.retrieve('opacity', 1);
  }

};

Element.implement({

  setOpacity: function(value)
  {
    return this.set('opacity', value, true);
  },

  getOpacity: function()
  {
    return this.get('opacity');
  },

  setStyle: function(property, value)
  {
    switch (property)
    {
      case 'opacity': return this.set('opacity', parseFloat(value));
      case 'float': property = (Browser.Engine.trident) ? 'styleFloat' : 'cssFloat';
    }
    property = property.camelCase();
    if ($type(value) != 'string')
    {
      var map = (Element.Styles.get(property) || '@').split(' ');
      value = $splat(value).map(function(val, i)
      {
        if (!map[i]) return '';
        return ($type(val) == 'number') ? map[i].replace('@', Math.round(val)) : val;
      }).join(' ');
    } else if (value == String(Number(value)))
    {
      value = Math.round(value);
    }
    this.style[property] = value;
    return this;
  },

  getStyle: function(property)
  {
    switch (property)
    {
      case 'opacity': return this.get('opacity');
      case 'float': property = (Browser.Engine.trident) ? 'styleFloat' : 'cssFloat';
    }
    property = property.camelCase();
    var result = this.style[property];
    if (!$chk(result))
    {
      result = [];
      for (var style in Element.ShortStyles)
      {
        if (property != style) continue;
        for (var s in Element.ShortStyles[style]) result.push(this.getStyle(s));
        return result.join(' ');
      }
      result = this.getComputedStyle(property);
    }
    if (result)
    {
      result = String(result);
      var color = result.match(/rgba?\([\d\s,]+\)/);
      if (color) result = result.replace(color[0], color[0].rgbToHex());
    }
    if (Browser.Engine.presto || (Browser.Engine.trident && !$chk(parseInt(result, 10))))
    {
      if (property.test(/^(height|width)$/))
      {
        var values = (property == 'width') ? ['left', 'right'] : ['top', 'bottom'], size = 0;
        values.each(function(value)
        {
          size += this.getStyle('border-' + value + '-width').toInt() + this.getStyle('padding-' + value).toInt();
        }, this);
        return this['offset' + property.capitalize()] - size + 'px';
      }
      if ((Browser.Engine.presto) && String(result).test('px')) return result;
      if (property.test(/(border(.+)Width|margin|padding)/)) return '0px';
    }
    return result;
  },

  setStyles: function(styles)
  {
    for (var style in styles) this.setStyle(style, styles[style]);
    return this;
  },

  getStyles: function()
  {
    var result = {};
    Array.flatten(arguments).each(function(key)
    {
      result[key] = this.getStyle(key);
    }, this);
    return result;
  }

});

Element.Styles = new Hash({
  left: '@px', top: '@px', bottom: '@px', right: '@px',
  width: '@px', height: '@px', maxWidth: '@px', maxHeight: '@px', minWidth: '@px', minHeight: '@px',
  backgroundColor: 'rgb(@, @, @)', backgroundPosition: '@px @px', color: 'rgb(@, @, @)',
  fontSize: '@px', letterSpacing: '@px', lineHeight: '@px', clip: 'rect(@px @px @px @px)',
  margin: '@px @px @px @px', padding: '@px @px @px @px', border: '@px @ rgb(@, @, @) @px @ rgb(@, @, @) @px @ rgb(@, @, @)',
  borderWidth: '@px @px @px @px', borderStyle: '@ @ @ @', borderColor: 'rgb(@, @, @) rgb(@, @, @) rgb(@, @, @) rgb(@, @, @)',
  zIndex: '@', 'zoom': '@', fontWeight: '@', textIndent: '@px', opacity: '@'
});

Element.ShortStyles = { margin: {}, padding: {}, border: {}, borderWidth: {}, borderStyle: {}, borderColor: {} };

['Top', 'Right', 'Bottom', 'Left'].each(function(direction)
{
  var Short = Element.ShortStyles;
  var All = Element.Styles;
  ['margin', 'padding'].each(function(style)
  {
    var sd = style + direction;
    Short[style][sd] = All[sd] = '@px';
  });
  var bd = 'border' + direction;
  Short.border[bd] = All[bd] = '@px @ rgb(@, @, @)';
  var bdw = bd + 'Width', bds = bd + 'Style', bdc = bd + 'Color';
  Short[bd] = {};
  Short.borderWidth[bdw] = Short[bd][bdw] = All[bdw] = '@px';
  Short.borderStyle[bds] = Short[bd][bds] = All[bds] = '@';
  Short.borderColor[bdc] = Short[bd][bdc] = All[bdc] = 'rgb(@, @, @)';
});


/*
---

script: Element.Dimensions.js

description: Contains methods to work with size, scroll, or positioning of Elements and the window object.

license: MIT-style license.

credits:
- Element positioning based on the [qooxdoo](http://qooxdoo.org/) code and smart browser fixes, [LGPL License](http://www.gnu.org/licenses/lgpl.html).
- Viewport dimensions based on [YUI](http://developer.yahoo.com/yui/) code, [BSD License](http://developer.yahoo.com/yui/license.html).

requires:
- /Element

provides: [Element.Dimensions]

...
*/

(function()
{

  Element.implement({

    scrollTo: function(x, y)
    {
      if (isBody(this))
      {
        this.getWindow().scrollTo(x, y);
      } else
      {
        this.scrollLeft = x;
        this.scrollTop = y;
      }
      return this;
    },

    getSize: function()
    {
      if (isBody(this)) return this.getWindow().getSize();
      return { x: this.offsetWidth, y: this.offsetHeight };
    },

    getScrollSize: function()
    {
      if (isBody(this)) return this.getWindow().getScrollSize();
      return { x: this.scrollWidth, y: this.scrollHeight };
    },

    getScroll: function()
    {
      if (isBody(this)) return this.getWindow().getScroll();
      return { x: this.scrollLeft, y: this.scrollTop };
    },

    getScrolls: function()
    {
      var element = this, position = { x: 0, y: 0 };
      while (element && !isBody(element))
      {
        position.x += element.scrollLeft;
        position.y += element.scrollTop;
        element = element.parentNode;
      }
      return position;
    },

    getOffsetParent: function()
    {
      var element = this;
      if (isBody(element)) return null;
      if (!Browser.Engine.trident) return element.offsetParent;
      while ((element = element.parentNode) && !isBody(element))
      {
        if (styleString(element, 'position') != 'static') return element;
      }
      return null;
    },

    getOffsets: function()
    {
      if (this.getBoundingClientRect)
      {
        var bound = this.getBoundingClientRect(),
				html = document.id(this.getDocument().documentElement),
				htmlScroll = html.getScroll(),
				elemScrolls = this.getScrolls(),
				elemScroll = this.getScroll(),
				isFixed = (styleString(this, 'position') == 'fixed');

        return {
          x: bound.left.toInt() + elemScrolls.x - elemScroll.x + ((isFixed) ? 0 : htmlScroll.x) - html.clientLeft,
          y: bound.top.toInt() + elemScrolls.y - elemScroll.y + ((isFixed) ? 0 : htmlScroll.y) - html.clientTop
        };
      }

      var element = this, position = { x: 0, y: 0 };
      if (isBody(this)) return position;

      while (element && !isBody(element))
      {
        position.x += element.offsetLeft;
        position.y += element.offsetTop;

        if (Browser.Engine.gecko)
        {
          if (!borderBox(element))
          {
            position.x += leftBorder(element);
            position.y += topBorder(element);
          }
          var parent = element.parentNode;
          if (parent && styleString(parent, 'overflow') != 'visible')
          {
            position.x += leftBorder(parent);
            position.y += topBorder(parent);
          }
        } else if (element != this && Browser.Engine.webkit)
        {
          position.x += leftBorder(element);
          position.y += topBorder(element);
        }

        element = element.offsetParent;
      }
      if (Browser.Engine.gecko && !borderBox(this))
      {
        position.x -= leftBorder(this);
        position.y -= topBorder(this);
      }
      return position;
    },

    getPosition: function(relative)
    {
      if (isBody(this)) return { x: 0, y: 0 };
      var offset = this.getOffsets(),
				scroll = this.getScrolls();
      var position = {
        x: offset.x - scroll.x,
        y: offset.y - scroll.y
      };
      var relativePosition = (relative && (relative = document.id(relative))) ? relative.getPosition() : { x: 0, y: 0 };
      return { x: position.x - relativePosition.x, y: position.y - relativePosition.y };
    },

    getCoordinates: function(element)
    {
      if (isBody(this)) return this.getWindow().getCoordinates();
      var position = this.getPosition(element),
				size = this.getSize();
      var obj = {
        left: position.x,
        top: position.y,
        width: size.x,
        height: size.y
      };
      obj.right = obj.left + obj.width;
      obj.bottom = obj.top + obj.height;
      return obj;
    },

    computePosition: function(obj)
    {
      return {
        left: obj.x - styleNumber(this, 'margin-left'),
        top: obj.y - styleNumber(this, 'margin-top')
      };
    },

    setPosition: function(obj)
    {
      return this.setStyles(this.computePosition(obj));
    }

  });


  Native.implement([Document, Window], {

    getSize: function()
    {
      if (Browser.Engine.presto || Browser.Engine.webkit)
      {
        var win = this.getWindow();
        return { x: win.innerWidth, y: win.innerHeight };
      }
      var doc = getCompatElement(this);
      return { x: doc.clientWidth, y: doc.clientHeight };
    },

    getScroll: function()
    {
      var win = this.getWindow(), doc = getCompatElement(this);
      return { x: win.pageXOffset || doc.scrollLeft, y: win.pageYOffset || doc.scrollTop };
    },

    getScrollSize: function()
    {
      var doc = getCompatElement(this), min = this.getSize();
      return { x: Math.max(doc.scrollWidth, min.x), y: Math.max(doc.scrollHeight, min.y) };
    },

    getPosition: function()
    {
      return { x: 0, y: 0 };
    },

    getCoordinates: function()
    {
      var size = this.getSize();
      return { top: 0, left: 0, bottom: size.y, right: size.x, height: size.y, width: size.x };
    }

  });

  // private methods

  var styleString = Element.getComputedStyle;

  function styleNumber(element, style)
  {
    return styleString(element, style).toInt() || 0;
  };

  function borderBox(element)
  {
    return styleString(element, '-moz-box-sizing') == 'border-box';
  };

  function topBorder(element)
  {
    return styleNumber(element, 'border-top-width');
  };

  function leftBorder(element)
  {
    return styleNumber(element, 'border-left-width');
  };

  function isBody(element)
  {
    return (/^(?:body|html)$/i).test(element.tagName);
  };

  function getCompatElement(element)
  {
    var doc = element.getDocument();
    return (!doc.compatMode || doc.compatMode == 'CSS1Compat') ? doc.html : doc.body;
  };

})();

//aliases
Element.alias('setPosition', 'position'); //compatability

Native.implement([Window, Document, Element], {

  getHeight: function()
  {
    return this.getSize().y;
  },

  getWidth: function()
  {
    return this.getSize().x;
  },

  getScrollTop: function()
  {
    return this.getScroll().y;
  },

  getScrollLeft: function()
  {
    return this.getScroll().x;
  },

  getScrollHeight: function()
  {
    return this.getScrollSize().y;
  },

  getScrollWidth: function()
  {
    return this.getScrollSize().x;
  },

  getTop: function()
  {
    return this.getPosition().y;
  },

  getLeft: function()
  {
    return this.getPosition().x;
  }

});


/*
---

script: Selectors.js

description: Adds advanced CSS-style querying capabilities for targeting HTML Elements. Includes pseudo selectors.

license: MIT-style license.

requires:
- /Element

provides: [Selectors]

...
*/

Native.implement([Document, Element], {

  getElements: function(expression, nocash)
  {
    expression = expression.split(',');
    var items, local = {};
    for (var i = 0, l = expression.length; i < l; i++)
    {
      var selector = expression[i], elements = Selectors.Utils.search(this, selector, local);
      if (i != 0 && elements.item) elements = $A(elements);
      items = (i == 0) ? elements : (items.item) ? $A(items).concat(elements) : items.concat(elements);
    }
    return new Elements(items, { ddup: (expression.length > 1), cash: !nocash });
  }

});

Element.implement({

  match: function(selector)
  {
    if (!selector || (selector == this)) return true;
    var tagid = Selectors.Utils.parseTagAndID(selector);
    var tag = tagid[0], id = tagid[1];
    if (!Selectors.Filters.byID(this, id) || !Selectors.Filters.byTag(this, tag)) return false;
    var parsed = Selectors.Utils.parseSelector(selector);
    return (parsed) ? Selectors.Utils.filter(this, parsed, {}) : true;
  }

});

var Selectors = { Cache: { nth: {}, parsed: {}} };

Selectors.RegExps = {
  id: (/#([\w-]+)/),
  tag: (/^(\w+|\*)/),
  quick: (/^(\w+|\*)$/),
  splitter: (/\s*([+>~\s])\s*([a-zA-Z#.*:\[])/g),
  combined: (/\.([\w-]+)|\[(\w+)(?:([!*^$~|]?=)(["']?)([^\4]*?)\4)?\]|:([\w-]+)(?:\(["']?(.*?)?["']?\)|$)/g)
};

Selectors.Utils = {

  chk: function(item, uniques)
  {
    if (!uniques) return true;
    var uid = $uid(item);
    if (!uniques[uid]) return uniques[uid] = true;
    return false;
  },

  parseNthArgument: function(argument)
  {
    if (Selectors.Cache.nth[argument]) return Selectors.Cache.nth[argument];
    var parsed = argument.match(/^([+-]?\d*)?([a-z]+)?([+-]?\d*)?$/);
    if (!parsed) return false;
    var inta = parseInt(parsed[1], 10);
    var a = (inta || inta === 0) ? inta : 1;
    var special = parsed[2] || false;
    var b = parseInt(parsed[3], 10) || 0;
    if (a != 0)
    {
      b--;
      while (b < 1) b += a;
      while (b >= a) b -= a;
    } else
    {
      a = b;
      special = 'index';
    }
    switch (special)
    {
      case 'n': parsed = { a: a, b: b, special: 'n' }; break;
      case 'odd': parsed = { a: 2, b: 0, special: 'n' }; break;
      case 'even': parsed = { a: 2, b: 1, special: 'n' }; break;
      case 'first': parsed = { a: 0, special: 'index' }; break;
      case 'last': parsed = { special: 'last-child' }; break;
      case 'only': parsed = { special: 'only-child' }; break;
      default: parsed = { a: (a - 1), special: 'index' };
    }

    return Selectors.Cache.nth[argument] = parsed;
  },

  parseSelector: function(selector)
  {
    if (Selectors.Cache.parsed[selector]) return Selectors.Cache.parsed[selector];
    var m, parsed = { classes: [], pseudos: [], attributes: [] };
    while ((m = Selectors.RegExps.combined.exec(selector)))
    {
      var cn = m[1], an = m[2], ao = m[3], av = m[5], pn = m[6], pa = m[7];
      if (cn)
      {
        parsed.classes.push(cn);
      } else if (pn)
      {
        var parser = Selectors.Pseudo.get(pn);
        if (parser) parsed.pseudos.push({ parser: parser, argument: pa });
        else parsed.attributes.push({ name: pn, operator: '=', value: pa });
      } else if (an)
      {
        parsed.attributes.push({ name: an, operator: ao, value: av });
      }
    }
    if (!parsed.classes.length) delete parsed.classes;
    if (!parsed.attributes.length) delete parsed.attributes;
    if (!parsed.pseudos.length) delete parsed.pseudos;
    if (!parsed.classes && !parsed.attributes && !parsed.pseudos) parsed = null;
    return Selectors.Cache.parsed[selector] = parsed;
  },

  parseTagAndID: function(selector)
  {
    var tag = selector.match(Selectors.RegExps.tag);
    var id = selector.match(Selectors.RegExps.id);
    return [(tag) ? tag[1] : '*', (id) ? id[1] : false];
  },

  filter: function(item, parsed, local)
  {
    var i;
    if (parsed.classes)
    {
      for (i = parsed.classes.length; i--; i)
      {
        var cn = parsed.classes[i];
        if (!Selectors.Filters.byClass(item, cn)) return false;
      }
    }
    if (parsed.attributes)
    {
      for (i = parsed.attributes.length; i--; i)
      {
        var att = parsed.attributes[i];
        if (!Selectors.Filters.byAttribute(item, att.name, att.operator, att.value)) return false;
      }
    }
    if (parsed.pseudos)
    {
      for (i = parsed.pseudos.length; i--; i)
      {
        var psd = parsed.pseudos[i];
        if (!Selectors.Filters.byPseudo(item, psd.parser, psd.argument, local)) return false;
      }
    }
    return true;
  },

  getByTagAndID: function(ctx, tag, id)
  {
    if (id)
    {
      var item = (ctx.getElementById) ? ctx.getElementById(id, true) : Element.getElementById(ctx, id, true);
      return (item && Selectors.Filters.byTag(item, tag)) ? [item] : [];
    } else
    {
      return ctx.getElementsByTagName(tag);
    }
  },

  search: function(self, expression, local)
  {
    var splitters = [];

    var selectors = expression.trim().replace(Selectors.RegExps.splitter, function(m0, m1, m2)
    {
      splitters.push(m1);
      return ':)' + m2;
    }).split(':)');

    var items, filtered, item;

    for (var i = 0, l = selectors.length; i < l; i++)
    {

      var selector = selectors[i];

      if (i == 0 && Selectors.RegExps.quick.test(selector))
      {
        items = self.getElementsByTagName(selector);
        continue;
      }

      var splitter = splitters[i - 1];

      var tagid = Selectors.Utils.parseTagAndID(selector);
      var tag = tagid[0], id = tagid[1];

      if (i == 0)
      {
        items = Selectors.Utils.getByTagAndID(self, tag, id);
      } else
      {
        var uniques = {}, found = [];
        for (var j = 0, k = items.length; j < k; j++) found = Selectors.Getters[splitter](found, items[j], tag, id, uniques);
        items = found;
      }

      var parsed = Selectors.Utils.parseSelector(selector);

      if (parsed)
      {
        filtered = [];
        for (var m = 0, n = items.length; m < n; m++)
        {
          item = items[m];
          if (Selectors.Utils.filter(item, parsed, local)) filtered.push(item);
        }
        items = filtered;
      }

    }

    return items;

  }

};

Selectors.Getters = {

  ' ': function(found, self, tag, id, uniques)
  {
    var items = Selectors.Utils.getByTagAndID(self, tag, id);
    for (var i = 0, l = items.length; i < l; i++)
    {
      var item = items[i];
      if (Selectors.Utils.chk(item, uniques)) found.push(item);
    }
    return found;
  },

  '>': function(found, self, tag, id, uniques)
  {
    var children = Selectors.Utils.getByTagAndID(self, tag, id);
    for (var i = 0, l = children.length; i < l; i++)
    {
      var child = children[i];
      if (child.parentNode == self && Selectors.Utils.chk(child, uniques)) found.push(child);
    }
    return found;
  },

  '+': function(found, self, tag, id, uniques)
  {
    while ((self = self.nextSibling))
    {
      if (self.nodeType == 1)
      {
        if (Selectors.Utils.chk(self, uniques) && Selectors.Filters.byTag(self, tag) && Selectors.Filters.byID(self, id)) found.push(self);
        break;
      }
    }
    return found;
  },

  '~': function(found, self, tag, id, uniques)
  {
    while ((self = self.nextSibling))
    {
      if (self.nodeType == 1)
      {
        if (!Selectors.Utils.chk(self, uniques)) break;
        if (Selectors.Filters.byTag(self, tag) && Selectors.Filters.byID(self, id)) found.push(self);
      }
    }
    return found;
  }

};

Selectors.Filters = {

  byTag: function(self, tag)
  {
    return (tag == '*' || (self.tagName && self.tagName.toLowerCase() == tag));
  },

  byID: function(self, id)
  {
    return (!id || (self.id && self.id == id));
  },

  byClass: function(self, klass)
  {
    return (self.className && self.className.contains && self.className.contains(klass, ' '));
  },

  byPseudo: function(self, parser, argument, local)
  {
    return parser.call(self, argument, local);
  },

  byAttribute: function(self, name, operator, value)
  {
    var result = Element.prototype.getProperty.call(self, name);
    if (!result) return (operator == '!=');
    if (!operator || value == undefined) return true;
    switch (operator)
    {
      case '=': return (result == value);
      case '*=': return (result.contains(value));
      case '^=': return (result.substr(0, value.length) == value);
      case '$=': return (result.substr(result.length - value.length) == value);
      case '!=': return (result != value);
      case '~=': return result.contains(value, ' ');
      case '|=': return result.contains(value, '-');
    }
    return false;
  }

};

Selectors.Pseudo = new Hash({

  // w3c pseudo selectors

  checked: function()
  {
    return this.checked;
  },

  empty: function()
  {
    return !(this.innerText || this.textContent || '').length;
  },

  not: function(selector)
  {
    return !Element.match(this, selector);
  },

  contains: function(text)
  {
    return (this.innerText || this.textContent || '').contains(text);
  },

  'first-child': function()
  {
    return Selectors.Pseudo.index.call(this, 0);
  },

  'last-child': function()
  {
    var element = this;
    while ((element = element.nextSibling))
    {
      if (element.nodeType == 1) return false;
    }
    return true;
  },

  'only-child': function()
  {
    var prev = this;
    while ((prev = prev.previousSibling))
    {
      if (prev.nodeType == 1) return false;
    }
    var next = this;
    while ((next = next.nextSibling))
    {
      if (next.nodeType == 1) return false;
    }
    return true;
  },

  'nth-child': function(argument, local)
  {
    argument = (argument == undefined) ? 'n' : argument;
    var parsed = Selectors.Utils.parseNthArgument(argument);
    if (parsed.special != 'n') return Selectors.Pseudo[parsed.special].call(this, parsed.a, local);
    var count = 0;
    local.positions = local.positions || {};
    var uid = $uid(this);
    if (!local.positions[uid])
    {
      var self = this;
      while ((self = self.previousSibling))
      {
        if (self.nodeType != 1) continue;
        count++;
        var position = local.positions[$uid(self)];
        if (position != undefined)
        {
          count = position + count;
          break;
        }
      }
      local.positions[uid] = count;
    }
    return (local.positions[uid] % parsed.a == parsed.b);
  },

  // custom pseudo selectors

  index: function(index)
  {
    var element = this, count = 0;
    while ((element = element.previousSibling))
    {
      if (element.nodeType == 1 && ++count > index) return false;
    }
    return (count == index);
  },

  even: function(argument, local)
  {
    return Selectors.Pseudo['nth-child'].call(this, '2n+1', local);
  },

  odd: function(argument, local)
  {
    return Selectors.Pseudo['nth-child'].call(this, '2n', local);
  },

  selected: function()
  {
    return this.selected;
  },

  enabled: function()
  {
    return (this.disabled === false);
  }

});


/*
---

script: DomReady.js

description: Contains the custom event domready.

license: MIT-style license.

requires:
- /Element.Event

provides: [DomReady]

...
*/

Element.Events.domready = {

  onAdd: function(fn)
  {
    if (Browser.loaded) fn.call(this);
  }

};

(function()
{

  var domready = function()
  {
    if (Browser.loaded) return;
    Browser.loaded = true;
    window.fireEvent('domready');
    document.fireEvent('domready');
  };

  window.addEvent('load', domready);

  if (Browser.Engine.trident)
  {
    var temp = document.createElement('div');
    (function()
    {
      ($try(function()
      {
        temp.doScroll(); // Technique by Diego Perini
        return document.id(temp).inject(document.body).set('html', 'temp').dispose();
      })) ? domready() : arguments.callee.delay(50);
    })();
  } else if (Browser.Engine.webkit && Browser.Engine.version < 525)
  {
    (function()
    {
      (['loaded', 'complete'].contains(document.readyState)) ? domready() : arguments.callee.delay(50);
    })();
  } else
  {
    document.addEvent('DOMContentLoaded', domready);
  }

})();


/*
---

script: JSON.js

description: JSON encoder and decoder.

license: MIT-style license.

See Also: <http://www.json.org/>

requires:
- /Array
- /String
- /Number
- /Function
- /Hash

provides: [JSON]

...
*/

var JSON = new Hash(this.JSON && {
  stringify: JSON.stringify,
  parse: JSON.parse
}).extend({

  $specialChars: { '\b': '\\b', '\t': '\\t', '\n': '\\n', '\f': '\\f', '\r': '\\r', '"': '\\"', '\\': '\\\\' },

  $replaceChars: function(chr)
  {
    return JSON.$specialChars[chr] || '\\u00' + Math.floor(chr.charCodeAt() / 16).toString(16) + (chr.charCodeAt() % 16).toString(16);
  },

  encode: function(obj)
  {
    switch ($type(obj))
    {
      case 'string':
        return '"' + obj.replace(/[\x00-\x1f\\"]/g, JSON.$replaceChars) + '"';
      case 'array':
        return '[' + String(obj.map(JSON.encode).clean()) + ']';
      case 'object': case 'hash':
        var string = [];
        Hash.each(obj, function(value, key)
        {
          var json = JSON.encode(value);
          if (json) string.push(JSON.encode(key) + ':' + json);
        });
        return '{' + string + '}';
      case 'number': case 'boolean': return String(obj);
      case false: return 'null';
    }
    return null;
  },

  decode: function(string, secure)
  {
    if ($type(string) != 'string' || !string.length) return null;
    if (secure && !(/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(string.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, ''))) return null;
    return eval('(' + string + ')');
  }

});

Native.implement([Hash, Array, String, Number], {

  toJSON: function()
  {
    return JSON.encode(this);
  }

});


/*
---

script: Cookie.js

description: Class for creating, reading, and deleting browser Cookies.

license: MIT-style license.

credits:
- Based on the functions by Peter-Paul Koch (http://quirksmode.org).

requires:
- /Options

provides: [Cookie]

...
*/

var Cookie = new Class({

  Implements: Options,

  options: {
    path: false,
    domain: false,
    duration: false,
    secure: false,
    document: document
  },

  initialize: function(key, options)
  {
    this.key = key;
    this.setOptions(options);
  },

  write: function(value)
  {
    value = encodeURIComponent(value);
    if (this.options.domain) value += '; domain=' + this.options.domain;
    if (this.options.path) value += '; path=' + this.options.path;
    if (this.options.duration)
    {
      var date = new Date();
      date.setTime(date.getTime() + this.options.duration * 24 * 60 * 60 * 1000);
      value += '; expires=' + date.toGMTString();
    }
    if (this.options.secure) value += '; secure';
    this.options.document.cookie = this.key + '=' + value;
    return this;
  },

  read: function()
  {
    var value = this.options.document.cookie.match('(?:^|;)\\s*' + this.key.escapeRegExp() + '=([^;]*)');
    return (value) ? decodeURIComponent(value[1]) : null;
  },

  dispose: function()
  {
    new Cookie(this.key, $merge(this.options, { duration: -1 })).write('');
    return this;
  }

});

Cookie.write = function(key, value, options)
{
  return new Cookie(key, options).write(value);
};

Cookie.read = function(key)
{
  return new Cookie(key).read();
};

Cookie.dispose = function(key, options)
{
  return new Cookie(key, options).dispose();
};


/*
---

script: Swiff.js

description: Wrapper for embedding SWF movies. Supports External Interface Communication.

license: MIT-style license.

credits: 
- Flash detection & Internet Explorer + Flash Player 9 fix inspired by SWFObject.

requires:
- /Options
- /$util

provides: [Swiff]

...
*/

var Swiff = new Class({

  Implements: [Options],

  options: {
    id: null,
    height: 1,
    width: 1,
    container: null,
    properties: {},
    params: {
      quality: 'high',
      allowScriptAccess: 'always',
      wMode: 'transparent',
      swLiveConnect: true
    },
    callBacks: {},
    vars: {}
  },

  toElement: function()
  {
    return this.object;
  },

  initialize: function(path, options)
  {
    this.instance = 'Swiff_' + $time();

    this.setOptions(options);
    options = this.options;
    var id = this.id = options.id || this.instance;
    var container = document.id(options.container);

    Swiff.CallBacks[this.instance] = {};

    var params = options.params, vars = options.vars, callBacks = options.callBacks;
    var properties = $extend({ height: options.height, width: options.width }, options.properties);

    var self = this;

    for (var callBack in callBacks)
    {
      Swiff.CallBacks[this.instance][callBack] = (function(option)
      {
        return function()
        {
          return option.apply(self.object, arguments);
        };
      })(callBacks[callBack]);
      vars[callBack] = 'Swiff.CallBacks.' + this.instance + '.' + callBack;
    }

    params.flashVars = Hash.toQueryString(vars);
    if (Browser.Engine.trident)
    {
      properties.classid = 'clsid:D27CDB6E-AE6D-11cf-96B8-444553540000';
      params.movie = path;
    } else
    {
      properties.type = 'application/x-shockwave-flash';
      properties.data = path;
    }
    var build = '<object id="' + id + '"';
    for (var property in properties) build += ' ' + property + '="' + properties[property] + '"';
    build += '>';
    for (var param in params)
    {
      if (params[param]) build += '<param name="' + param + '" value="' + params[param] + '" />';
    }
    build += '</object>';
    this.object = ((container) ? container.empty() : new Element('div')).set('html', build).firstChild;
  },

  replaces: function(element)
  {
    element = document.id(element, true);
    element.parentNode.replaceChild(this.toElement(), element);
    return this;
  },

  inject: function(element)
  {
    document.id(element, true).appendChild(this.toElement());
    return this;
  },

  remote: function()
  {
    return Swiff.remote.apply(Swiff, [this.toElement()].extend(arguments));
  }

});

Swiff.CallBacks = {};

Swiff.remote = function(obj, fn)
{
  var rs = obj.CallFunction('<invoke name="' + fn + '" returntype="javascript">' + __flash__argumentsToXML(arguments, 2) + '</invoke>');
  return eval(rs);
};


/*
---

script: Fx.js

description: Contains the basic animation logic to be extended by all other Fx Classes.

license: MIT-style license.

requires:
- /Chain
- /Events
- /Options

provides: [Fx]

...
*/

var Fx = new Class({

  Implements: [Chain, Events, Options],

  options: {
    /*
    onStart: $empty,
    onCancel: $empty,
    onComplete: $empty,
    */
    fps: 50,
    unit: false,
    duration: 500,
    link: 'ignore'
  },

  initialize: function(options)
  {
    this.subject = this.subject || this;
    this.setOptions(options);
    this.options.duration = Fx.Durations[this.options.duration] || this.options.duration.toInt();
    var wait = this.options.wait;
    if (wait === false) this.options.link = 'cancel';
  },

  getTransition: function()
  {
    return function(p)
    {
      return -(Math.cos(Math.PI * p) - 1) / 2;
    };
  },

  step: function()
  {
    var time = $time();
    if (time < this.time + this.options.duration)
    {
      var delta = this.transition((time - this.time) / this.options.duration);
      this.set(this.compute(this.from, this.to, delta));
    } else
    {
      this.set(this.compute(this.from, this.to, 1));
      this.complete();
    }
  },

  set: function(now)
  {
    return now;
  },

  compute: function(from, to, delta)
  {
    return Fx.compute(from, to, delta);
  },

  check: function()
  {
    if (!this.timer) return true;
    switch (this.options.link)
    {
      case 'cancel': this.cancel(); return true;
      case 'chain': this.chain(this.caller.bind(this, arguments)); return false;
    }
    return false;
  },

  start: function(from, to)
  {
    if (!this.check(from, to)) return this;
    this.from = from;
    this.to = to;
    this.time = 0;
    this.transition = this.getTransition();
    this.startTimer();
    this.onStart();
    return this;
  },

  complete: function()
  {
    if (this.stopTimer()) this.onComplete();
    return this;
  },

  cancel: function()
  {
    if (this.stopTimer()) this.onCancel();
    return this;
  },

  onStart: function()
  {
    this.fireEvent('start', this.subject);
  },

  onComplete: function()
  {
    this.fireEvent('complete', this.subject);
    if (!this.callChain()) this.fireEvent('chainComplete', this.subject);
  },

  onCancel: function()
  {
    this.fireEvent('cancel', this.subject).clearChain();
  },

  pause: function()
  {
    this.stopTimer();
    return this;
  },

  resume: function()
  {
    this.startTimer();
    return this;
  },

  stopTimer: function()
  {
    if (!this.timer) return false;
    this.time = $time() - this.time;
    this.timer = $clear(this.timer);
    return true;
  },

  startTimer: function()
  {
    if (this.timer) return false;
    this.time = $time() - this.time;
    this.timer = this.step.periodical(Math.round(1000 / this.options.fps), this);
    return true;
  }

});

Fx.compute = function(from, to, delta)
{
  return (to - from) * delta + from;
};

Fx.Durations = { 'short': 250, 'normal': 500, 'long': 1000 };


/*
---

script: Fx.CSS.js

description: Contains the CSS animation logic. Used by Fx.Tween, Fx.Morph, Fx.Elements.

license: MIT-style license.

requires:
- /Fx
- /Element.Style

provides: [Fx.CSS]

...
*/

Fx.CSS = new Class({

  Extends: Fx,

  //prepares the base from/to object

  prepare: function(element, property, values)
  {
    values = $splat(values);
    var values1 = values[1];
    if (!$chk(values1))
    {
      values[1] = values[0];
      values[0] = element.getStyle(property);
    }
    var parsed = values.map(this.parse);
    return { from: parsed[0], to: parsed[1] };
  },

  //parses a value into an array

  parse: function(value)
  {
    value = $lambda(value)();
    value = (typeof value == 'string') ? value.split(' ') : $splat(value);
    return value.map(function(val)
    {
      val = String(val);
      var found = false;
      Fx.CSS.Parsers.each(function(parser, key)
      {
        if (found) return;
        var parsed = parser.parse(val);
        if ($chk(parsed)) found = { value: parsed, parser: parser };
      });
      found = found || { value: val, parser: Fx.CSS.Parsers.String };
      return found;
    });
  },

  //computes by a from and to prepared objects, using their parsers.

  compute: function(from, to, delta)
  {
    var computed = [];
    (Math.min(from.length, to.length)).times(function(i)
    {
      computed.push({ value: from[i].parser.compute(from[i].value, to[i].value, delta), parser: from[i].parser });
    });
    computed.$family = { name: 'fx:css:value' };
    return computed;
  },

  //serves the value as settable

  serve: function(value, unit)
  {
    if ($type(value) != 'fx:css:value') value = this.parse(value);
    var returned = [];
    value.each(function(bit)
    {
      returned = returned.concat(bit.parser.serve(bit.value, unit));
    });
    return returned;
  },

  //renders the change to an element

  render: function(element, property, value, unit)
  {
    element.setStyle(property, this.serve(value, unit));
  },

  //searches inside the page css to find the values for a selector

  search: function(selector)
  {
    if (Fx.CSS.Cache[selector]) return Fx.CSS.Cache[selector];
    var to = {};
    Array.each(document.styleSheets, function(sheet, j)
    {
      var href = sheet.href;
      if (href && href.contains('://') && !href.contains(document.domain)) return;
      var rules = sheet.rules || sheet.cssRules;
      Array.each(rules, function(rule, i)
      {
        if (!rule.style) return;
        var selectorText = (rule.selectorText) ? rule.selectorText.replace(/^\w+/, function(m)
        {
          return m.toLowerCase();
        }) : null;
        if (!selectorText || !selectorText.test('^' + selector + '$')) return;
        Element.Styles.each(function(value, style)
        {
          if (!rule.style[style] || Element.ShortStyles[style]) return;
          value = String(rule.style[style]);
          to[style] = (value.test(/^rgb/)) ? value.rgbToHex() : value;
        });
      });
    });
    return Fx.CSS.Cache[selector] = to;
  }

});

Fx.CSS.Cache = {};

Fx.CSS.Parsers = new Hash({

  Color: {
    parse: function(value)
    {
      if (value.match(/^#[0-9a-f]{3,6}$/i)) return value.hexToRgb(true);
      return ((value = value.match(/(\d+),\s*(\d+),\s*(\d+)/))) ? [value[1], value[2], value[3]] : false;
    },
    compute: function(from, to, delta)
    {
      return from.map(function(value, i)
      {
        return Math.round(Fx.compute(from[i], to[i], delta));
      });
    },
    serve: function(value)
    {
      return value.map(Number);
    }
  },

  Number: {
    parse: parseFloat,
    compute: Fx.compute,
    serve: function(value, unit)
    {
      return (unit) ? value + unit : value;
    }
  },

  String: {
    parse: $lambda(false),
    compute: $arguments(1),
    serve: $arguments(0)
  }

});


/*
---

script: Fx.Tween.js

description: Formerly Fx.Style, effect to transition any CSS property for an element.

license: MIT-style license.

requires: 
- /Fx.CSS

provides: [Fx.Tween, Element.fade, Element.highlight]

...
*/

Fx.Tween = new Class({

  Extends: Fx.CSS,

  initialize: function(element, options)
  {
    this.element = this.subject = document.id(element);
    this.parent(options);
  },

  set: function(property, now)
  {
    if (arguments.length == 1)
    {
      now = property;
      property = this.property || this.options.property;
    }
    this.render(this.element, property, now, this.options.unit);
    return this;
  },

  start: function(property, from, to)
  {
    if (!this.check(property, from, to)) return this;
    var args = Array.flatten(arguments);
    this.property = this.options.property || args.shift();
    var parsed = this.prepare(this.element, this.property, args);
    return this.parent(parsed.from, parsed.to);
  }

});

Element.Properties.tween = {

  set: function(options)
  {
    var tween = this.retrieve('tween');
    if (tween) tween.cancel();
    return this.eliminate('tween').store('tween:options', $extend({ link: 'cancel' }, options));
  },

  get: function(options)
  {
    if (options || !this.retrieve('tween'))
    {
      if (options || !this.retrieve('tween:options')) this.set('tween', options);
      this.store('tween', new Fx.Tween(this, this.retrieve('tween:options')));
    }
    return this.retrieve('tween');
  }

};

Element.implement({

  tween: function(property, from, to)
  {
    this.get('tween').start(arguments);
    return this;
  },

  fade: function(how)
  {
    var fade = this.get('tween'), o = 'opacity', toggle;
    how = $pick(how, 'toggle');
    switch (how)
    {
      case 'in': fade.start(o, 1); break;
      case 'out': fade.start(o, 0); break;
      case 'show': fade.set(o, 1); break;
      case 'hide': fade.set(o, 0); break;
      case 'toggle':
        var flag = this.retrieve('fade:flag', this.get('opacity') == 1);
        fade.start(o, (flag) ? 0 : 1);
        this.store('fade:flag', !flag);
        toggle = true;
        break;
      default: fade.start(o, arguments);
    }
    if (!toggle) this.eliminate('fade:flag');
    return this;
  },

  highlight: function(start, end)
  {
    if (!end)
    {
      end = this.retrieve('highlight:original', this.getStyle('background-color'));
      end = (end == 'transparent') ? '#fff' : end;
    }
    var tween = this.get('tween');
    tween.start('background-color', start || '#ffff88', end).chain(function()
    {
      this.setStyle('background-color', this.retrieve('highlight:original'));
      tween.callChain();
    } .bind(this));
    return this;
  }

});


/*
---

script: Fx.Morph.js

description: Formerly Fx.Styles, effect to transition any number of CSS properties for an element using an object of rules, or CSS based selector rules.

license: MIT-style license.

requires:
- /Fx.CSS

provides: [Fx.Morph]

...
*/

Fx.Morph = new Class({

  Extends: Fx.CSS,

  initialize: function(element, options)
  {
    this.element = this.subject = document.id(element);
    this.parent(options);
  },

  set: function(now)
  {
    if (typeof now == 'string') now = this.search(now);
    for (var p in now) this.render(this.element, p, now[p], this.options.unit);
    return this;
  },

  compute: function(from, to, delta)
  {
    var now = {};
    for (var p in from) now[p] = this.parent(from[p], to[p], delta);
    return now;
  },

  start: function(properties)
  {
    if (!this.check(properties)) return this;
    if (typeof properties == 'string') properties = this.search(properties);
    var from = {}, to = {};
    for (var p in properties)
    {
      var parsed = this.prepare(this.element, p, properties[p]);
      from[p] = parsed.from;
      to[p] = parsed.to;
    }
    return this.parent(from, to);
  }

});

Element.Properties.morph = {

  set: function(options)
  {
    var morph = this.retrieve('morph');
    if (morph) morph.cancel();
    return this.eliminate('morph').store('morph:options', $extend({ link: 'cancel' }, options));
  },

  get: function(options)
  {
    if (options || !this.retrieve('morph'))
    {
      if (options || !this.retrieve('morph:options')) this.set('morph', options);
      this.store('morph', new Fx.Morph(this, this.retrieve('morph:options')));
    }
    return this.retrieve('morph');
  }

};

Element.implement({

  morph: function(props)
  {
    this.get('morph').start(props);
    return this;
  }

});


/*
---

script: Fx.Transitions.js

description: Contains a set of advanced transitions to be used with any of the Fx Classes.

license: MIT-style license.

credits:
- Easing Equations by Robert Penner, <http://www.robertpenner.com/easing/>, modified and optimized to be used with MooTools.

requires:
- /Fx

provides: [Fx.Transitions]

...
*/

Fx.implement({

  getTransition: function()
  {
    var trans = this.options.transition || Fx.Transitions.Sine.easeInOut;
    if (typeof trans == 'string')
    {
      var data = trans.split(':');
      trans = Fx.Transitions;
      trans = trans[data[0]] || trans[data[0].capitalize()];
      if (data[1]) trans = trans['ease' + data[1].capitalize() + (data[2] ? data[2].capitalize() : '')];
    }
    return trans;
  }

});

Fx.Transition = function(transition, params)
{
  params = $splat(params);
  return $extend(transition, {
    easeIn: function(pos)
    {
      return transition(pos, params);
    },
    easeOut: function(pos)
    {
      return 1 - transition(1 - pos, params);
    },
    easeInOut: function(pos)
    {
      return (pos <= 0.5) ? transition(2 * pos, params) / 2 : (2 - transition(2 * (1 - pos), params)) / 2;
    }
  });
};

Fx.Transitions = new Hash({

  linear: $arguments(0)

});

Fx.Transitions.extend = function(transitions)
{
  for (var transition in transitions) Fx.Transitions[transition] = new Fx.Transition(transitions[transition]);
};

Fx.Transitions.extend({

  Pow: function(p, x)
  {
    return Math.pow(p, x[0] || 6);
  },

  Expo: function(p)
  {
    return Math.pow(2, 8 * (p - 1));
  },

  Circ: function(p)
  {
    return 1 - Math.sin(Math.acos(p));
  },

  Sine: function(p)
  {
    return 1 - Math.sin((1 - p) * Math.PI / 2);
  },

  Back: function(p, x)
  {
    x = x[0] || 1.618;
    return Math.pow(p, 2) * ((x + 1) * p - x);
  },

  Bounce: function(p)
  {
    var value;
    for (var a = 0, b = 1; 1; a += b, b /= 2)
    {
      if (p >= (7 - 4 * a) / 11)
      {
        value = b * b - Math.pow((11 - 6 * a - 11 * p) / 4, 2);
        break;
      }
    }
    return value;
  },

  Elastic: function(p, x)
  {
    return Math.pow(2, 10 * --p) * Math.cos(20 * p * Math.PI * (x[0] || 1) / 3);
  }

});

['Quad', 'Cubic', 'Quart', 'Quint'].each(function(transition, i)
{
  Fx.Transitions[transition] = new Fx.Transition(function(p)
  {
    return Math.pow(p, [i + 2]);
  });
});


/*
---

script: Request.js

description: Powerful all purpose Request Class. Uses XMLHTTPRequest.

license: MIT-style license.

requires:
- /Element
- /Chain
- /Events
- /Options
- /Browser

provides: [Request]

...
*/

var Request = new Class({

  Implements: [Chain, Events, Options],

  options: {/*
		onRequest: $empty,
		onComplete: $empty,
		onCancel: $empty,
		onSuccess: $empty,
		onFailure: $empty,
		onException: $empty,*/
    url: '',
    data: '',
    headers: {
      'X-Requested-With': 'XMLHttpRequest',
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
    },
    async: true,
    format: false,
    method: 'post',
    link: 'ignore',
    isSuccess: null,
    emulation: true,
    urlEncoded: true,
    encoding: 'utf-8',
    evalScripts: false,
    evalResponse: false,
    noCache: false
  },

  initialize: function(options)
  {
    this.xhr = new Browser.Request();
    this.setOptions(options);
    this.options.isSuccess = this.options.isSuccess || this.isSuccess;
    this.headers = new Hash(this.options.headers);
  },

  onStateChange: function()
  {
    if (this.xhr.readyState != 4 || !this.running) return;
    this.running = false;
    this.status = 0;
    $try(function()
    {
      this.status = this.xhr.status;
    } .bind(this));
    this.xhr.onreadystatechange = $empty;
    if (this.options.isSuccess.call(this, this.status))
    {
      this.response = { text: this.xhr.responseText, xml: this.xhr.responseXML };
      this.success(this.response.text, this.response.xml);
    } else
    {
      this.response = { text: null, xml: null };
      this.failure();
    }
  },

  isSuccess: function()
  {
    return ((this.status >= 200) && (this.status < 300));
  },

  processScripts: function(text)
  {
    if (this.options.evalResponse || (/(ecma|java)script/).test(this.getHeader('Content-type'))) return $exec(text);
    return text.stripScripts(this.options.evalScripts);
  },

  success: function(text, xml)
  {
    this.onSuccess(this.processScripts(text), xml);
  },

  onSuccess: function()
  {
    this.fireEvent('complete', arguments).fireEvent('success', arguments).callChain();
  },

  failure: function()
  {
    this.onFailure();
  },

  onFailure: function()
  {
    this.fireEvent('complete').fireEvent('failure', this.xhr);
  },

  setHeader: function(name, value)
  {
    this.headers.set(name, value);
    return this;
  },

  getHeader: function(name)
  {
    return $try(function()
    {
      return this.xhr.getResponseHeader(name);
    } .bind(this));
  },

  check: function()
  {
    if (!this.running) return true;
    switch (this.options.link)
    {
      case 'cancel': this.cancel(); return true;
      case 'chain': this.chain(this.caller.bind(this, arguments)); return false;
    }
    return false;
  },

  send: function(options)
  {
    if (!this.check(options)) return this;
    this.running = true;

    var type = $type(options);
    if (type == 'string' || type == 'element') options = { data: options };

    var old = this.options;
    options = $extend({ data: old.data, url: old.url, method: old.method }, options);
    var data = options.data, url = String(options.url), method = options.method.toLowerCase();

    switch ($type(data))
    {
      case 'element': data = document.id(data).toQueryString(); break;
      case 'object': case 'hash': data = Hash.toQueryString(data);
    }

    if (this.options.format)
    {
      var format = 'format=' + this.options.format;
      data = (data) ? format + '&' + data : format;
    }

    if (this.options.emulation && !['get', 'post'].contains(method))
    {
      var _method = '_method=' + method;
      data = (data) ? _method + '&' + data : _method;
      method = 'post';
    }

    if (this.options.urlEncoded && method == 'post')
    {
      var encoding = (this.options.encoding) ? '; charset=' + this.options.encoding : '';
      this.headers.set('Content-type', 'application/x-www-form-urlencoded' + encoding);
    }

    if (this.options.noCache)
    {
      var noCache = 'noCache=' + new Date().getTime();
      data = (data) ? noCache + '&' + data : noCache;
    }

    var trimPosition = url.lastIndexOf('/');
    if (trimPosition > -1 && (trimPosition = url.indexOf('#')) > -1) url = url.substr(0, trimPosition);

    if (data && method == 'get')
    {
      url = url + (url.contains('?') ? '&' : '?') + data;
      data = null;
    }

    this.xhr.open(method.toUpperCase(), url, this.options.async);

    this.xhr.onreadystatechange = this.onStateChange.bind(this);

    this.headers.each(function(value, key)
    {
      try
      {
        this.xhr.setRequestHeader(key, value);
      } catch (e)
      {
        this.fireEvent('exception', [key, value]);
      }
    }, this);

    this.fireEvent('request');
    this.xhr.send(data);
    if (!this.options.async) this.onStateChange();
    return this;
  },

  cancel: function()
  {
    if (!this.running) return this;
    this.running = false;
    this.xhr.abort();
    this.xhr.onreadystatechange = $empty;
    this.xhr = new Browser.Request();
    this.fireEvent('cancel');
    return this;
  }

});

(function()
{

  var methods = {};
  ['get', 'post', 'put', 'delete', 'GET', 'POST', 'PUT', 'DELETE'].each(function(method)
  {
    methods[method] = function()
    {
      var params = Array.link(arguments, { url: String.type, data: $defined });
      return this.send($extend(params, { method: method }));
    };
  });

  Request.implement(methods);

})();

Element.Properties.send = {

  set: function(options)
  {
    var send = this.retrieve('send');
    if (send) send.cancel();
    return this.eliminate('send').store('send:options', $extend({
      data: this, link: 'cancel', method: this.get('method') || 'post', url: this.get('action')
    }, options));
  },

  get: function(options)
  {
    if (options || !this.retrieve('send'))
    {
      if (options || !this.retrieve('send:options')) this.set('send', options);
      this.store('send', new Request(this.retrieve('send:options')));
    }
    return this.retrieve('send');
  }

};

Element.implement({

  send: function(url)
  {
    var sender = this.get('send');
    sender.send({ data: this, url: url || sender.options.url });
    return this;
  }

});


/*
---

script: Request.HTML.js

description: Extends the basic Request Class with additional methods for interacting with HTML responses.

license: MIT-style license.

requires:
- /Request
- /Element

provides: [Request.HTML]

...
*/

Request.HTML = new Class({

  Extends: Request,

  options: {
    update: false,
    append: false,
    evalScripts: true,
    filter: false
  },

  processHTML: function(text)
  {
    var match = text.match(/<body[^>]*>([\s\S]*?)<\/body>/i);
    text = (match) ? match[1] : text;

    var container = new Element('div');

    return $try(function()
    {
      var root = '<root>' + text + '</root>', doc;
      if (Browser.Engine.trident)
      {
        doc = new ActiveXObject('Microsoft.XMLDOM');
        doc.async = false;
        doc.loadXML(root);
      } else
      {
        doc = new DOMParser().parseFromString(root, 'text/xml');
      }
      root = doc.getElementsByTagName('root')[0];
      if (!root) return null;
      for (var i = 0, k = root.childNodes.length; i < k; i++)
      {
        var child = Element.clone(root.childNodes[i], true, true);
        if (child) container.grab(child);
      }
      return container;
    }) || container.set('html', text);
  },

  success: function(text)
  {
    var options = this.options, response = this.response;

    response.html = text.stripScripts(function(script)
    {
      response.javascript = script;
    });

    var temp = this.processHTML(response.html);

    response.tree = temp.childNodes;
    response.elements = temp.getElements('*');

    if (options.filter) response.tree = response.elements.filter(options.filter);
    if (options.update) document.id(options.update).empty().set('html', response.html);
    else if (options.append) document.id(options.append).adopt(temp.getChildren());
    if (options.evalScripts) $exec(response.javascript);

    this.onSuccess(response.tree, response.elements, response.html, response.javascript);
  }

});

Element.Properties.load = {

  set: function(options)
  {
    var load = this.retrieve('load');
    if (load) load.cancel();
    return this.eliminate('load').store('load:options', $extend({ data: this, link: 'cancel', update: this, method: 'get' }, options));
  },

  get: function(options)
  {
    if (options || !this.retrieve('load'))
    {
      if (options || !this.retrieve('load:options')) this.set('load', options);
      this.store('load', new Request.HTML(this.retrieve('load:options')));
    }
    return this.retrieve('load');
  }

};

Element.implement({

  load: function()
  {
    this.get('load').send(Array.link(arguments, { data: Object.type, url: String.type }));
    return this;
  }

});


/*
---

script: Request.JSON.js

description: Extends the basic Request Class with additional methods for sending and receiving JSON data.

license: MIT-style license.

requires:
- /Request JSON

provides: [Request.HTML]

...
*/

Request.JSON = new Class({

  Extends: Request,

  options: {
    secure: true
  },

  initialize: function(options)
  {
    this.parent(options);
    this.headers.extend({ 'Accept': 'application/json', 'X-Request': 'JSON' });
  },

  success: function(text)
  {
    this.response.json = JSON.decode(text, this.options.secure);
    this.onSuccess(this.response.json, text);
  }

});