/*  Prototype JavaScript framework, version 1.5.0_rc0
	 *  (c) 2005 Sam Stephenson <sam@conio.net>
	 *
	 *  Prototype is freely distributable under the terms of an MIT-style license.
	 *  For details, see the Prototype web site: http://prototype.conio.net/
	 *
	/* ------------------------------------------------------------------------ */
	
	status = "Prototype 1.5.0_rc0 loaded";
	setTimeout('status = ""',500);
	
	var Prototype =
	{
	  Version:'1.5.0_rc0',
	  ScriptFragment:'(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',
	
	  emptyFunction:function(){},
	  K:function(x){return x}
	}
	
	// =========
	// Base - S
	// =========
	
	var Class =
	{
	  create: function()
	  {
		return function(){this.initialize.apply(this, arguments);}
	  }
	}
	
	var Abstract = new Object();
	
	Object.extend = function(destination, source)
	{
	  for (var property in source) {
		destination[property] = source[property];
	  }
	  return destination;
	}
	
	Object.inspect = function(object)
	{
	  try {
		if (object == undefined) return 'undefined';
		if (object == null) return 'null';
		return object.inspect ? object.inspect() : object.toString();
	  } catch (e) {
		if (e instanceof RangeError) return '...';
		throw e;
	  }
	}
	
	Function.prototype.bind = function() {
	  var __method = this, args = $A(arguments), object = args.shift();
	  return function() {
		return __method.apply(object, args.concat($A(arguments)));
	  }
	}
	
	Function.prototype.bindAsEventListener = function(object) {
	  var __method = this;
	  return function(event) {
		return __method.call(object, event || window.event);
	  }
	}
	
	Object.extend(Number.prototype, {
	  toColorPart: function() {
		var digits = this.toString(16);
		if (this < 16) return '0' + digits;
		return digits;
	  },
	
	  succ: function() {
		return this + 1;
	  },
	
	  times: function(iterator) {
		$R(0, this, true).each(iterator);
		return this;
	  }
	});
	
	var Try = {
	  these: function() {
		var returnValue;
	
		for (var i = 0; i < arguments.length; i++) {
		  var lambda = arguments[i];
		  try {
			returnValue = lambda();
			break;
		  } catch (e) {}
		}
	
		return returnValue;
	  }
	}
	
	// -----
	
	var PeriodicalExecuter = Class.create();
	PeriodicalExecuter.prototype = {
	  initialize: function(callback, frequency) {
		this.callback = callback;
		this.frequency = frequency;
		this.currentlyExecuting = false;
	
		this.registerCallback();
	  },
	
	  registerCallback: function() {
		setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
	  },
	
	  onTimerEvent: function() {
		if (!this.currentlyExecuting) {
		  try {
			this.currentlyExecuting = true;
			this.callback();
		  } finally {
			this.currentlyExecuting = false;
		  }
		}
	  }
	}
	
	// =========
	// Base - E
	// =========
	
	
	
	
	
	// ===========
	// String - S
	// ===========
	
	Object.extend(String.prototype, {
	  gsub: function(pattern, replacement) {
		var result = '', source = this, match;
		replacement = arguments.callee.prepareReplacement(replacement);
	
		while (source.length > 0) {
		  if (match = source.match(pattern)) {
			result += source.slice(0, match.index);
			result += (replacement(match) || '').toString();
			source  = source.slice(match.index + match[0].length);
		  } else {
			result += source, source = '';
		  }
		}
		return result;
	  },
	
	  sub: function(pattern, replacement, count) {
		replacement = this.gsub.prepareReplacement(replacement);
		count = count === undefined ? 1 : count;
	
		return this.gsub(pattern, function(match) {
		  if (--count < 0) return match[0];
		  return replacement(match);
		});
	  },
	
	  scan: function(pattern, iterator) {
		this.gsub(pattern, iterator);
		return this;
	  },
	
	  truncate: function(length, truncation) {
		length = length || 30;
		truncation = truncation === undefined ? '...' : truncation;
		return this.length > length ?
		  this.slice(0, length - truncation.length) + truncation : this;
	  },
	
	  strip: function() {
		return this.replace(/^\s+/, '').replace(/\s+$/, '');
	  },
	
	  stripTags: function() {
		return this.replace(/<\/?[^>]+>/gi, '');
	  },
	
	  stripScripts: function() {
		return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
	  },
	
	  extractScripts: function() {
		var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
		var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
		return (this.match(matchAll) || []).map(function(scriptTag) {
		  return (scriptTag.match(matchOne) || ['', ''])[1];
		});
	  },
	
	  evalScripts: function() {
		return this.extractScripts().map(function(script) { return eval(script) });
	  },
	
	  escapeHTML: function() {
		var div = document.createElement('div');
		var text = document.createTextNode(this);
		div.appendChild(text);
		return div.innerHTML;
	  },
	
	  unescapeHTML: function() {
		var div = document.createElement('div');
		div.innerHTML = this.stripTags();
		return div.childNodes[0] ? div.childNodes[0].nodeValue : '';
	  },
	
	  toQueryParams: function() {
		var pairs = this.match(/^\??(.*)$/)[1].split('&');
		return pairs.inject({}, function(params, pairString) {
		  var pair = pairString.split('=');
		  params[pair[0]] = pair[1];
		  return params;
		});
	  },
	
	  toArray: function() {
		return this.split('');
	  },
	
	  camelize: function() {
		var oStringList = this.split('-');
		if (oStringList.length == 1) return oStringList[0];
	
		var camelizedString = this.indexOf('-') == 0
		  ? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1)
		  : oStringList[0];
	
		for (var i = 1, len = oStringList.length; i < len; i++) {
		  var s = oStringList[i];
		  camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
		}
	
		return camelizedString;
	  },
	
	  inspect: function() {
		return "'" + this.replace(/\\/g, '\\\\').replace(/'/g, '\\\'') + "'";
	  }
	});
	
	String.prototype.gsub.prepareReplacement = function(replacement) {
	  if (typeof replacement == 'function') return replacement;
	  var template = new Template(replacement);
	  return function(match) { return template.evaluate(match) };
	}
	
	String.prototype.parseQuery = String.prototype.toQueryParams;
	
	var Template = Class.create();
	Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
	Template.prototype = {
	  initialize: function(template, pattern) {
		this.template = template.toString();
		this.pattern  = pattern || Template.Pattern;
	  },
	
	  evaluate: function(object) {
		return this.template.gsub(this.pattern, function(match) {
		  var before = match[1];
		  if (before == '\\') return match[2];
		  return before + (object[match[3]] || '').toString();
		});
	  }
	}
	
	// ===========
	// String - E
	// ===========
	
	
	
	
	
	// ===============
	// Enumerable - S
	// ===============

	var $break    = new Object();
	var $continue = new Object();
	
	var Enumerable = {
	  each: function(iterator) {
		var index = 0;
		try {
		  this._each(function(value) {
			try {
			  iterator(value, index++);
			} catch (e) {
			  if (e != $continue) throw e;
			}
		  });
		} catch (e) {
		  if (e != $break) throw e;
		}
	  },
	
	  all: function(iterator) {
		var result = true;
		this.each(function(value, index) {
		  result = result && !!(iterator || Prototype.K)(value, index);
		  if (!result) throw $break;
		});
		return result;
	  },
	
	  any: function(iterator) {
		var result = true;
		this.each(function(value, index) {
		  if (result = !!(iterator || Prototype.K)(value, index))
			throw $break;
		});
		return result;
	  },
	
	  collect: function(iterator) {
		var results = [];
		this.each(function(value, index) {
		  results.push(iterator(value, index));
		});
		return results;
	  },
	
	  detect: function (iterator) {
		var result;
		this.each(function(value, index) {
		  if (iterator(value, index)) {
			result = value;
			throw $break;
		  }
		});
		return result;
	  },
	
	  findAll: function(iterator) {
		var results = [];
		this.each(function(value, index) {
		  if (iterator(value, index))
			results.push(value);
		});
		return results;
	  },
	
	  grep: function(pattern, iterator) {
		var results = [];
		this.each(function(value, index) {
		  var stringValue = value.toString();
		  if (stringValue.match(pattern))
			results.push((iterator || Prototype.K)(value, index));
		})
		return results;
	  },
	
	  include: function(object) {
		var found = false;
		this.each(function(value) {
		  if (value == object) {
			found = true;
			throw $break;
		  }
		});
		return found;
	  },
	
	  inject: function(memo, iterator) {
		this.each(function(value, index) {
		  memo = iterator(memo, value, index);
		});
		return memo;
	  },
	
	  invoke: function(method) {
		var args = $A(arguments).slice(1);
		return this.collect(function(value) {
		  return value[method].apply(value, args);
		});
	  },
	
	  max: function(iterator) {
		var result;
		this.each(function(value, index) {
		  value = (iterator || Prototype.K)(value, index);
		  if (result == undefined || value >= result)
			result = value;
		});
		return result;
	  },
	
	  min: function(iterator) {
		var result;
		this.each(function(value, index) {
		  value = (iterator || Prototype.K)(value, index);
		  if (result == undefined || value < result)
			result = value;
		});
		return result;
	  },
	
	  partition: function(iterator) {
		var trues = [], falses = [];
		this.each(function(value, index) {
		  ((iterator || Prototype.K)(value, index) ?
			trues : falses).push(value);
		});
		return [trues, falses];
	  },
	
	  pluck: function(property) {
		var results = [];
		this.each(function(value, index) {
		  results.push(value[property]);
		});
		return results;
	  },
	
	  reject: function(iterator) {
		var results = [];
		this.each(function(value, index) {
		  if (!iterator(value, index))
			results.push(value);
		});
		return results;
	  },
	
	  sortBy: function(iterator) {
		return this.collect(function(value, index) {
		  return {value: value, criteria: iterator(value, index)};
		}).sort(function(left, right) {
		  var a = left.criteria, b = right.criteria;
		  return a < b ? -1 : a > b ? 1 : 0;
		}).pluck('value');
	  },
	
	  toArray: function() {
		return this.collect(Prototype.K);
	  },
	
	  zip: function() {
		var iterator = Prototype.K, args = $A(arguments);
		if (typeof args.last() == 'function')
		  iterator = args.pop();
	
		var collections = [this].concat(args).map($A);
		return this.map(function(value, index) {
		  return iterator(collections.pluck(index));
		});
	  },
	
	  inspect: function() {
		return '#<Enumerable:' + this.toArray().inspect() + '>';
	  }
	}
	
	Object.extend(Enumerable, {
	  map:     Enumerable.collect,
	  find:    Enumerable.detect,
	  select:  Enumerable.findAll,
	  member:  Enumerable.include,
	  entries: Enumerable.toArray
	});
	
	// ===============
	// Enumerable - E
	// ===============
	
	
	
	

	// ==========
	// Array - S
	// ==========
	
	var $A = Array.from = function(iterable) {
	  if (!iterable) return [];
	  if (iterable.toArray) {
		return iterable.toArray();
	  } else {
		var results = [];
		for (var i = 0; i < iterable.length; i++)
		  results.push(iterable[i]);
		return results;
	  }
	}
	
	Object.extend(Array.prototype, Enumerable);
	
	if (!Array.prototype._reverse)
	  Array.prototype._reverse = Array.prototype.reverse;
	
	Object.extend(Array.prototype, {
	  _each: function(iterator) {
		for (var i = 0; i < this.length; i++)
		  iterator(this[i]);
	  },
	
	  clear: function() {
		this.length = 0;
		return this;
	  },
	
	  first: function() {
		return this[0];
	  },
	
	  last: function() {
		return this[this.length - 1];
	  },
	
	  compact: function() {
		return this.select(function(value) {
		  return value != undefined || value != null;
		});
	  },
	
	  flatten: function() {
		return this.inject([], function(array, value) {
		  return array.concat((value && value.constructor == Array)?value.flatten():[value]);
		});
	  },
	
	  without: function() {
		var values = $A(arguments);
		return this.select(function(value) {
		  return !values.include(value);
		});
	  },
	
	  indexOf: function(object) {
		for (var i = 0; i < this.length; i++)
		  if (this[i] == object) return i;
		return -1;
	  },
	
	  reverse: function(inline) {
		return (inline !== false ? this : this.toArray())._reverse();
	  },
	
	  inspect: function() {
		return '[' + this.map(Object.inspect).join(', ') + ']';
	  }
	});
	
	// ==========
	// Array - E
	// ==========
	
	
	
	

	// ==========
	// Hash - S
	// ==========
	
	var Hash = {
	  _each: function(iterator) {
		for (var key in this) {
		  var value = this[key];
		  if (typeof value == 'function') continue;
	
		  var pair = [key, value];
		  pair.key = key;
		  pair.value = value;
		  iterator(pair);
		}
	  },
	
	  keys: function() {
		return this.pluck('key');
	  },
	
	  values: function() {
		return this.pluck('value');
	  },
	
	  merge: function(hash) {
		return $H(hash).inject($H(this), function(mergedHash, pair) {
		  mergedHash[pair.key] = pair.value;
		  return mergedHash;
		});
	  },
	
	  toQueryString: function() {
		return this.map(function(pair) {
		  return pair.map(encodeURIComponent).join('=');
		}).join('&');
	  },
	
	  inspect: function() {
		return '#<Hash:{' + this.map(function(pair) {
		  return pair.map(Object.inspect).join(': ');
		}).join(', ') + '}>';
	  }
	}
	
	function $H(object) {
	  var hash = Object.extend({}, object || {});
	  Object.extend(hash, Enumerable);
	  Object.extend(hash, Hash);
	  return hash;
	}
	ObjectRange = Class.create();
	Object.extend(ObjectRange.prototype, Enumerable);
	Object.extend(ObjectRange.prototype, {
	  initialize: function(start, end, exclusive) {
		this.start = start;
		this.end = end;
		this.exclusive = exclusive;
	  },
	
	  _each: function(iterator) {
		var value = this.start;
		do {
		  iterator(value);
		  value = value.succ();
		} while (this.include(value));
	  },
	
	  include: function(value) {
		if (value < this.start)
		  return false;
		if (this.exclusive)
		  return value < this.end;
		return value <= this.end;
	  }
	});
	
	var $R = function(start, end, exclusive) {
	  return new ObjectRange(start, end, exclusive);
	}
	
	// ==========
	// Hash - E
	// ==========
	
	
	
	
	
	// ==========
	// Ajax - S
	// ==========
	
	var Ajax = {
	  getTransport: function() {
		return Try.these(
		  function() {return new XMLHttpRequest()},
		  function() {return new ActiveXObject('Msxml2.XMLHTTP')},
		  function() {return new ActiveXObject('Microsoft.XMLHTTP')}
		) || false;
	  },
	
	  activeRequestCount: 0
	}
	
	Ajax.Responders = {
	  responders: [],
	
	  _each: function(iterator) {
		this.responders._each(iterator);
	  },
	
	  register: function(responderToAdd) {
		if (!this.include(responderToAdd))
		  this.responders.push(responderToAdd);
	  },
	
	  unregister: function(responderToRemove) {
		this.responders = this.responders.without(responderToRemove);
	  },
	
	  dispatch: function(callback, request, transport, json) {
		this.each(function(responder) {
		  if (responder[callback] && typeof responder[callback] == 'function') {
			try {
			  responder[callback].apply(responder, [request, transport, json]);
			} catch (e) {}
		  }
		});
	  }
	};
	
	Object.extend(Ajax.Responders, Enumerable);
	
	Ajax.Responders.register({
	  onCreate: function() {
		Ajax.activeRequestCount++;
	  },
	
	  onComplete: function() {
		Ajax.activeRequestCount--;
	  }
	});
	
	Ajax.Base = function() {};
	Ajax.Base.prototype = {
	  setOptions: function(options) {
		this.options = {
		  method:       'post',
		  asynchronous: true,
		  contentType:  'application/x-www-form-urlencoded',
		  parameters:   ''
		}
		Object.extend(this.options, options || {});
	  },
	
	  responseIsSuccess: function() {
		return this.transport.status == undefined
			|| this.transport.status == 0
			|| (this.transport.status >= 200 && this.transport.status < 300);
	  },
	
	  responseIsFailure: function() {
		return !this.responseIsSuccess();
	  }
	}
	
	Ajax.Request = Class.create();
	Ajax.Request.Events =
	  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
	
	Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
	  initialize: function(url, options) {
		this.transport = Ajax.getTransport();
		this.setOptions(options);
		this.request(url);
	  },
	
	  request: function(url) {
		var parameters = this.options.parameters || '';
		if (parameters.length > 0) parameters += '&_=';
	
		try {
		  this.url = url;
		  if (this.options.method == 'get' && parameters.length > 0)
			this.url += (this.url.match(/\?/) ? '&' : '?') + parameters;
	
		  Ajax.Responders.dispatch('onCreate', this, this.transport);
	
		  this.transport.open(this.options.method, this.url,
			this.options.asynchronous);
	
		  if (this.options.asynchronous) {
			this.transport.onreadystatechange = this.onStateChange.bind(this);
			setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10);
		  }
	
		  this.setRequestHeaders();
	
		  var body = this.options.postBody ? this.options.postBody : parameters;
		  this.transport.send(this.options.method == 'post' ? body : null);
	
		} catch (e) {
		  this.dispatchException(e);
		}
	  },
	
	  setRequestHeaders: function() {
		var requestHeaders =
		  ['X-Requested-With', 'XMLHttpRequest',
		   'X-Prototype-Version', Prototype.Version,
		   'Accept', 'text/javascript, text/html, application/xml, text/xml, */*'];
	
		if (this.options.method == 'post') {
		  requestHeaders.push('Content-type', this.options.contentType);
	
		  /* Force "Connection: close" for Mozilla browsers to work around
		   * a bug where XMLHttpReqeuest sends an incorrect Content-length
		   * header. See Mozilla Bugzilla #246651.
		   */
		  if (this.transport.overrideMimeType)
			requestHeaders.push('Connection', 'close');
		}
	
		if (this.options.requestHeaders)
		  requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);
	
		for (var i = 0; i < requestHeaders.length; i += 2)
		  this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]);
	  },
	
	  onStateChange: function() {
		var readyState = this.transport.readyState;
		if (readyState != 1)
		  this.respondToReadyState(this.transport.readyState);
	  },
	
	  header: function(name) {
		try {
		  return this.transport.getResponseHeader(name);
		} catch (e) {}
	  },
	
	  evalJSON: function() {
		try {
		  return eval('(' + this.header('X-JSON') + ')');
		} catch (e) {}
	  },
	
	  evalResponse: function() {
		try {
		  return eval(this.transport.responseText);
		} catch (e) {
		  this.dispatchException(e);
		}
	  },
	
	  respondToReadyState: function(readyState) {
		var event = Ajax.Request.Events[readyState];
		var transport = this.transport, json = this.evalJSON();
	
		if (event == 'Complete') {
		  try {
			(this.options['on' + this.transport.status]
			 || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')]
			 || Prototype.emptyFunction)(transport, json);
		  } catch (e) {
			this.dispatchException(e);
		  }
	
		  if ((this.header('Content-type') || '').match(/^text\/javascript/i))
			this.evalResponse();
		}
	
		try {
		  (this.options['on' + event] || Prototype.emptyFunction)(transport, json);
		  Ajax.Responders.dispatch('on' + event, this, transport, json);
		} catch (e) {
		  this.dispatchException(e);
		}
	
		/* Avoid memory leak in MSIE: clean up the oncomplete event handler */
		if (event == 'Complete')
		  this.transport.onreadystatechange = Prototype.emptyFunction;
	  },
	
	  dispatchException: function(exception) {
		(this.options.onException || Prototype.emptyFunction)(this, exception);
		Ajax.Responders.dispatch('onException', this, exception);
	  }
	});
	
	Ajax.Updater = Class.create();
	
	Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
	  initialize: function(container, url, options) {
		this.containers = {
		  success: container.success ? $(container.success) : $(container),
		  failure: container.failure ? $(container.failure) :
			(container.success ? null : $(container))
		}
	
		this.transport = Ajax.getTransport();
		this.setOptions(options);
	
		var onComplete = this.options.onComplete || Prototype.emptyFunction;
		this.options.onComplete = (function(transport, object) {
		  this.updateContent();
		  onComplete(transport, object);
		}).bind(this);
	
		this.request(url);
	  },
	
	  updateContent: function() {
		var receiver = this.responseIsSuccess() ?
		  this.containers.success : this.containers.failure;
		var response = this.transport.responseText;
	
		if (!this.options.evalScripts)
		  response = response.stripScripts();
	
		if (receiver) {
		  if (this.options.insertion) {
			new this.options.insertion(receiver, response);
		  } else {
			Element.update(receiver, response);
		  }
		}
	
		if (this.responseIsSuccess()) {
		  if (this.onComplete)
			setTimeout(this.onComplete.bind(this), 10);
		}
	  }
	});
	
	Ajax.PeriodicalUpdater = Class.create();
	Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
	  initialize: function(container, url, options) {
		this.setOptions(options);
		this.onComplete = this.options.onComplete;
	
		this.frequency = (this.options.frequency || 2);
		this.decay = (this.options.decay || 1);
	
		this.updater = {};
		this.container = container;
		this.url = url;
	
		this.start();
	  },
	
	  start: function() {
		this.options.onComplete = this.updateComplete.bind(this);
		this.onTimerEvent();
	  },
	
	  stop: function() {
		this.updater.onComplete = undefined;
		clearTimeout(this.timer);
		(this.onComplete || Prototype.emptyFunction).apply(this, arguments);
	  },
	
	  updateComplete: function(request) {
		if (this.options.decay) {
		  this.decay = (request.responseText == this.lastText ?
			this.decay * this.options.decay : 1);
	
		  this.lastText = request.responseText;
		}
		this.timer = setTimeout(this.onTimerEvent.bind(this),
		  this.decay * this.frequency * 1000);
	  },
	
	  onTimerEvent: function() {
		this.updater = new Ajax.Updater(this.container, this.url, this.options);
	  }
	});
	
	// ==========
	// Ajax - E
	// ==========
	
	
	
	

	// ==========
	// Dom - S
	// ==========
	
	function $()
	{
		// results : Array elements created container
		var results = [], element;
		for(var i=0;i<arguments.length;i++)
		{
			element = arguments[i];
			if(typeof element == 'string') element = document.getElementById(element);
			// Go line 1060
			results.push(Element.extend(element));
		}
		// return one or several elements
		return (results.length<2)?results[0]:results;
	}
	
	// Element appendTo another
	function $T()
	{
		for(i=0;i<arguments.length;i++)
		{
			if(typeof arguments[i] == 'string')
			{	
				arguments[i] = $(arguments[i]);
			}
		}
		arguments[1].appendChild(arguments[0]);
		
	}
	
	// DOM element creator for jQuery and Prototype by Michael Geary
	// http://mg.to/topics/programming/javascript/jquery
	// http://mg.to/2006/02/27/easy-dom-creation-for-jquery-and-prototype
	
	$.defineTag = function(tag)
	{
		$[tag.toUpperCase()] = function(){return $._createNode(tag, arguments);}
	};
	
	(function(){
		var tags = [
			'a', 'br', 'button', 'canvas', 'div', 'fieldset', 'form',
			'h1', 'h2', 'h3', 'hr', 'img', 'input', 'label', 'legend',
			'li', 'ol', 'optgroup', 'option', 'p', 'pre', 'select',
			'span', 'strong', 'table', 'tbody', 'td', 'textarea',
			'tfoot', 'th', 'thead', 'tr', 'tt', 'ul' ];
		for( var i = tags.length - 1;  i >= 0;  i-- ) {
			$.defineTag( tags[i] );
		}
	})();
	
	$.NBSP = '\u00a0';
	
	$._createNode = function(tag,args)
	{
		var fix = {'class':'className','Class':'className'};
		var e;
		try
		{
			var attrs = args[0]||{};
			e = document.createElement(tag);
			for(var attr in attrs)
			{
				var a = fix[attr]||attr;
				e[a] = attrs[attr];
			}
			for(var i=1;i<args.length; i++)
			{
				var arg = args[i];
				if(arg == null) continue;
				if(arg.constructor != Array) append(arg);
				else for(var j=0;j<arg.length;j++) append(arg[j]);
			}
		}
		catch(ex)
		{
			alert('Cannot create <' + tag + '> element:\n' + args.toSource() + '\n' + args);
			e = null;
		}
		
		function append(arg)
		{
			if(arg == null) return;
			var c = arg.constructor;
			switch(typeof arg)
			{
				case 'number':arg = '' + arg;  // fall through
				case 'string':arg = document.createTextNode(arg);
			}
			e.appendChild(arg);
		}
		
		return e;
	};	

		
	document.getElementsByClassName = function(className, parentElement)
	{
		var children = ($(parentElement) || document.body).getElementsByTagName('*');
		return $A(children).inject([], function(elements, child){
		if (child.className.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
		elements.push(Element.extend(child));
		return elements;
		});
	}
	
	// --------
	// Element
	
	if(!window.Element) var Element = new Object();
	
	Element.extend = function(element)
	{
		if(!element) return;
		if(_nativeExtensions) return element;
		
		if(!element._extended && element.tagName && element != window)
		{
			var methods = Element.Methods, cache = Element.extend.cache;
			for(property in methods)
			{
				var value = methods[property];
				if(typeof value == 'function') element[property] = cache.findOrStore(value);
			}
		}
		
		element._extended = true;
		return element;
	}
	
	Element.extend.cache =
	{
	  findOrStore:function(value)
	  {
		return this[value] = this[value] || function(){return value.apply(null, [this].concat($A(arguments)));}
	  }
	}
	
	Element.Methods =
	{
	  // Can manage only one element
	  visible:function(element)
	  {
		// Ajout 2006/05/15
		// return $(element).style.display != 'none'
		return $(element).style.display != "none" && $(element).getStyle("display") != "none";
	  },
	
	  toggle:function()
	  {
		for(var i=0;i<arguments.length;i++)
		{
			var element = $(arguments[i]);
			Element[Element.visible(element)?'hide':'show'](element);
		}
	  },
	
	  hide:function()
	  {
		for(var i=0;i<arguments.length;i++)
		{
			var element = $(arguments[i]);
			element.style.display = 'none';
		}
	  },
	
	  show:function()
	  {
		for(var i = 0; i < arguments.length; i++)
		{
			var element = $(arguments[i]);
			element.style.display = "";
		}
	  },
		
	  remove:function(element)
	  {
		element = $(element);
		element.parentNode.removeChild(element);
	  },
	
	  update:function(element, html)
	  {
		$(element).innerHTML = html.stripScripts();
		setTimeout(function(){html.evalScripts()},10);
	  },
	
	  replace:function(element, html)
	  {
		element = $(element);
		if(element.outerHTML) element.outerHTML = html.stripScripts();
		else
		{
			var range = element.ownerDocument.createRange();
			range.selectNodeContents(element);
			element.parentNode.replaceChild(range.createContextualFragment(html.stripScripts()), element);
		}
		setTimeout(function(){html.evalScripts()},10);
	  },
	
	  getWidth:function(element)
	  {
		element = $(element);
		return element.offsetWidth;
	  },
	
	  getHeight:function(element)
	  {
		element = $(element);
		return element.offsetHeight;
	  },
	
	  dimension:function(element,w,h)
	  {
		element = $(element);
		element.style.width = w+"px";
		element.style.height = h+"px";
	  },
	
	  position:function(element,l,t)
	  {
		element = $(element);
		if(l) element.style.left = l+"px";
		if(t) element.style.top = t+"px";
	  },
	
	  classNames:function(element) {
		return new Element.ClassNames(element);
	  },
	  	
	  hasClassName:function(element, className)
	  {
		if (!(element = $(element))) return;
		return Element.classNames(element).include(className);
	  },
	
	  addClassName:function(element, className)
	  {
		if(!(element = $(element))) return;
		return Element.classNames(element).add(className);
	  },
	
	  removeClassName:function(element, className)
	  {
		if (!(element = $(element))) return;
		return Element.classNames(element).remove(className);
	  },
	
	  // removes whitespace-only text node children
	  cleanWhitespace:function(element)
	  {
		element = $(element);
		for (var i = 0; i < element.childNodes.length; i++) {
		  var node = element.childNodes[i];
		  if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
			Element.remove(node);
		}
	  },
	
	  empty:function(element)
	  {
		return $(element).innerHTML.match(/^\s*$/);
	  },
	
	  childOf:function(element, ancestor) {
		element = $(element), ancestor = $(ancestor);
		while (element = element.parentNode)
		  if (element == ancestor) return true;
		return false;
	  },
	
	  scrollTo:function(element) {
		element = $(element);
		var x = element.x ? element.x : element.offsetLeft,
			y = element.y ? element.y : element.offsetTop;
		window.scrollTo(x, y);
	  },
	
	  getStyle:function(element, style) {
		element = $(element);
		var value = element.style[style.camelize()];
		if(!value)
		{
		  if(document.defaultView && document.defaultView.getComputedStyle)
		  {
			var css = document.defaultView.getComputedStyle(element, null);
			value = css?css.getPropertyValue(style):null;
		  }
		  else if(element.currentStyle)
		  {
			value = element.currentStyle[style.camelize()];
		  }
		}
	
		if(window.opera && ['left', 'top', 'right', 'bottom'].include(style))
			if(Element.getStyle(element, 'position') == 'static') value = 'auto';
			
		return value == 'auto'?null:value;
	  },
	
	  setStyle:function(element, style) {
		element = $(element);
		for (var name in style)
		  element.style[name.camelize()] = style[name];
	  },
	
	  getDimensions:function(element) {
		element = $(element);
		if (Element.getStyle(element, 'display') != 'none')
		  return {width: element.offsetWidth, height: element.offsetHeight};
	
		// All *Width and *Height properties give 0 on elements with display none,
		// so enable the element temporarily
		var els = element.style;
		var originalVisibility = els.visibility;
		var originalPosition = els.position;
		els.visibility = 'hidden';
		els.position = 'absolute';
		els.display = '';
		var originalWidth = element.clientWidth;
		var originalHeight = element.clientHeight;
		els.display = 'none';
		els.position = originalPosition;
		els.visibility = originalVisibility;
		return {width: originalWidth, height: originalHeight};
	  },
	
	  makePositioned:function(element) {
		element = $(element);
		var pos = Element.getStyle(element, 'position');
		if(pos == 'static' || !pos)
		{
		  element._madePositioned = true;
		  element.style.position = 'relative';
		  // Opera returns the offset relative to the positioning context, when an
		  // element is position relative but top and left have not been defined
		  if(window.opera)
		  {
			element.style.top = 0;
			element.style.left = 0;
		  }
		}
	  },
	
	  undoPositioned:function(element)
	  {
		element = $(element);
		if(element._madePositioned)
		{
		  element._madePositioned = undefined;
		  element.style.position = element.style.top = element.style.left = element.style.bottom = element.style.right = '';
		}
	  },
	
	  makeClipping:function(element) {
		element = $(element);
		if (element._overflow) return;
		element._overflow = element.style.overflow;
		if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
		  element.style.overflow = 'hidden';
	  },
	
	  undoClipping:function(element) {
		element = $(element);
		if (element._overflow) return;
		element.style.overflow = element._overflow;
		element._overflow = undefined;
	  }
	  
	}
		 	
	Object.extend(Element, Element.Methods);
	
	var _nativeExtensions = false;
	
	if(!HTMLElement && /Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
	  var HTMLElement = {}
	  HTMLElement.prototype = document.createElement('div').__proto__;
	}
	
	Element.addMethods = function(methods) {
	  Object.extend(Element.Methods, methods || {});
	
	  if(typeof HTMLElement != 'undefined') {
		var methods = Element.Methods, cache = Element.extend.cache;
		for (property in methods) {
		  var value = methods[property];
		  if (typeof value == 'function')
			HTMLElement.prototype[property] = cache.findOrStore(value);
		}
		_nativeExtensions = true;
	  }
	}
		
	Element.addMethods();
	
	var Toggle = new Object();
	Toggle.display = Element.toggle;
	
	// ==========
	// Dom - E
	// ==========
	
	
	
	
	
	// =============
	// Abstract - S
	// =============
	
	Abstract.Insertion = function(adjacency) {
	  this.adjacency = adjacency;
	}
	
	Abstract.Insertion.prototype = {
	  initialize: function(element, content) {
		this.element = $(element);
		this.content = content.stripScripts();
	
		if (this.adjacency && this.element.insertAdjacentHTML) {
		  try {
			this.element.insertAdjacentHTML(this.adjacency, this.content);
		  } catch (e) {
			var tagName = this.element.tagName.toLowerCase();
			if (tagName == 'tbody' || tagName == 'tr') {
			  this.insertContent(this.contentFromAnonymousTable());
			} else {
			  throw e;
			}
		  }
		} else {
		  this.range = this.element.ownerDocument.createRange();
		  if (this.initializeRange) this.initializeRange();
		  this.insertContent([this.range.createContextualFragment(this.content)]);
		}
	
		setTimeout(function() {content.evalScripts()}, 10);
	  },
	
	  contentFromAnonymousTable: function() {
		var div = document.createElement('div');
		div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
		return $A(div.childNodes[0].childNodes[0].childNodes);
	  }
	}
	
	
	
	
	
	// ==============
	// Insertion - S
	// ==============

	var Insertion = new Object();
	
	Insertion.Before = Class.create();
	Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
	  initializeRange: function() {
		this.range.setStartBefore(this.element);
	  },
	
	  insertContent: function(fragments) {
		fragments.each((function(fragment) {
		  this.element.parentNode.insertBefore(fragment, this.element);
		}).bind(this));
	  }
	});
	
	Insertion.Top = Class.create();
	Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
	  initializeRange: function() {
		this.range.selectNodeContents(this.element);
		this.range.collapse(true);
	  },
	
	  insertContent: function(fragments) {
		fragments.reverse(false).each((function(fragment) {
		  this.element.insertBefore(fragment, this.element.firstChild);
		}).bind(this));
	  }
	});
	
	Insertion.Bottom = Class.create();
	Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
	  initializeRange: function() {
		this.range.selectNodeContents(this.element);
		this.range.collapse(this.element);
	  },
	
	  insertContent: function(fragments) {
		fragments.each((function(fragment) {
		  this.element.appendChild(fragment);
		}).bind(this));
	  }
	});
	
	Insertion.After = Class.create();
	Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
	  initializeRange: function() {
		this.range.setStartAfter(this.element);
	  },
	
	  insertContent: function(fragments) {
		fragments.each((function(fragment) {
		  this.element.parentNode.insertBefore(fragment,
			this.element.nextSibling);
		}).bind(this));
	  }
	});
	
	// ==============
	// Insertion - S
	// ==============
	
	
	
	
	
	Element.ClassNames = Class.create();
	Element.ClassNames.prototype = {
	  initialize: function(element) {
		this.element = $(element);
	  },
	
	  _each: function(iterator) {
		this.element.className.split(/\s+/).select(function(name) {
		  return name.length > 0;
		})._each(iterator);
	  },
	
	  set: function(className) {
		this.element.className = className;
	  },
	
	  add:function(classNameToAdd)
	  {
		if(this.include(classNameToAdd)) return;
		this.set(this.toArray().concat(classNameToAdd).join(' '));
	  },
	
	  remove: function(classNameToRemove) {
		if (!this.include(classNameToRemove)) return;
		this.set(this.select(function(className) {
		  return className != classNameToRemove;
		}).join(' '));
	  },
	
	  toString: function() {
		return this.toArray().join(' ');
	  }
	}
	
	Object.extend(Element.ClassNames.prototype, Enumerable);
	var Selector = Class.create();
	Selector.prototype = {
	  initialize: function(expression) {
		this.params = {classNames: []};
		this.expression = expression.toString().strip();
		this.parseExpression();
		this.compileMatcher();
	  },
	
	  parseExpression: function() {
		function abort(message) { throw 'Parse error in selector: ' + message; }
	
		if (this.expression == '')  abort('empty expression');
	
		var params = this.params, expr = this.expression, match, modifier, clause, rest;
		while (match = expr.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)) {
		  params.attributes = params.attributes || [];
		  params.attributes.push({name: match[2], operator: match[3], value: match[4] || match[5] || ''});
		  expr = match[1];
		}
	
		if (expr == '*') return this.params.wildcard = true;
	
		while (match = expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)) {
		  modifier = match[1], clause = match[2], rest = match[3];
		  switch (modifier) {
			case '#':       params.id = clause; break;
			case '.':       params.classNames.push(clause); break;
			case '':
			case undefined: params.tagName = clause.toUpperCase(); break;
			default:        abort(expr.inspect());
		  }
		  expr = rest;
		}
	
		if (expr.length > 0) abort(expr.inspect());
	  },
	
	  buildMatchExpression: function() {
		var params = this.params, conditions = [], clause;
	
		if (params.wildcard)
		  conditions.push('true');
		if (clause = params.id)
		  conditions.push('element.id == ' + clause.inspect());
		if (clause = params.tagName)
		  conditions.push('element.tagName.toUpperCase() == ' + clause.inspect());
		if ((clause = params.classNames).length > 0)
		  for (var i = 0; i < clause.length; i++)
			conditions.push('Element.hasClassName(element, ' + clause[i].inspect() + ')');
		if (clause = params.attributes) {
		  clause.each(function(attribute) {
			var value = 'element.getAttribute(' + attribute.name.inspect() + ')';
			var splitValueBy = function(delimiter) {
			  return value + ' && ' + value + '.split(' + delimiter.inspect() + ')';
			}
	
			switch (attribute.operator) {
			  case '=':       conditions.push(value + ' == ' + attribute.value.inspect()); break;
			  case '~=':      conditions.push(splitValueBy(' ') + '.include(' + attribute.value.inspect() + ')'); break;
			  case '|=':      conditions.push(
								splitValueBy('-') + '.first().toUpperCase() == ' + attribute.value.toUpperCase().inspect()
							  ); break;
			  case '!=':      conditions.push(value + ' != ' + attribute.value.inspect()); break;
			  case '':
			  case undefined: conditions.push(value + ' != null'); break;
			  default:        throw 'Unknown operator ' + attribute.operator + ' in selector';
			}
		  });
		}
	
		return conditions.join(' && ');
	  },
	
	  compileMatcher: function() {
		this.match = new Function('element', 'if (!element.tagName) return false; \
		  return ' + this.buildMatchExpression());
	  },
	
	  findElements: function(scope) {
		var element;
	
		if (element = $(this.params.id))
		  if (this.match(element))
			if (!scope || Element.childOf(element, scope))
			  return [element];
	
		scope = (scope || document).getElementsByTagName(this.params.tagName || '*');
	
		var results = [];
		for (var i = 0; i < scope.length; i++)
		  if (this.match(element = scope[i]))
			results.push(Element.extend(element));
	
		return results;
	  },
	
	  toString: function() {
		return this.expression;
	  }
	}
	
	function $$() {
	  return $A(arguments).map(function(expression) {
		return expression.strip().split(/\s+/).inject([null], function(results, expr) {
		  var selector = new Selector(expr);
		  return results.map(selector.findElements.bind(selector)).flatten();
		});
	  }).flatten();
	}
	
	
	var Field = {
	  clear: function() {
		for (var i = 0; i < arguments.length; i++)
		  $(arguments[i]).value = '';
	  },
	
	  focus: function(element) {
		$(element).focus();
	  },
	
	  present: function() {
		for (var i = 0; i < arguments.length; i++)
		  if ($(arguments[i]).value == '') return false;
		return true;
	  },
	
	  select: function(element) {
		$(element).select();
	  },
	
	  activate: function(element) {
		element = $(element);
		element.focus();
		if (element.select)
		  element.select();
	  }
	}
	
	
	
	
	
	// =========
	// Form - S
	// =========
	
	var Form = {
	  serialize: function(form) {
		var elements = Form.getElements($(form));
		var queryComponents = new Array();
	
		for (var i = 0; i < elements.length; i++) {
		  var queryComponent = Form.Element.serialize(elements[i]);
		  if (queryComponent)
			queryComponents.push(queryComponent);
		}
	
		return queryComponents.join('&');
	  },
	
	  getElements: function(form) {
		form = $(form);
		var elements = new Array();
	
		for (var tagName in Form.Element.Serializers) {
		  var tagElements = form.getElementsByTagName(tagName);
		  for (var j = 0; j < tagElements.length; j++)
			elements.push(tagElements[j]);
		}
		return elements;
	  },
	
	  getInputs: function(form, typeName, name) {
		form = $(form);
		var inputs = form.getElementsByTagName('input');
	
		if (!typeName && !name)
		  return inputs;
	
		var matchingInputs = new Array();
		for (var i = 0; i < inputs.length; i++) {
		  var input = inputs[i];
		  if ((typeName && input.type != typeName) ||
			  (name && input.name != name))
			continue;
		  matchingInputs.push(input);
		}
	
		return matchingInputs;
	  },
	
	  disable: function(form) {
		var elements = Form.getElements(form);
		for (var i = 0; i < elements.length; i++) {
		  var element = elements[i];
		  element.blur();
		  element.disabled = 'true';
		}
	  },
	
	  enable: function(form) {
		var elements = Form.getElements(form);
		for (var i = 0; i < elements.length; i++) {
		  var element = elements[i];
		  element.disabled = '';
		}
	  },
	
	
	  findFirstElement: function(form) {
		return Form.getElements(form).find(function(element) {
		  return element.type != 'hidden' && !element.disabled &&
			['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
		});
	  },
	
	  focusFirstElement: function(form) {
		Field.activate(Form.findFirstElement(form));
	  },
	
	  reset: function(form) {
		$(form).reset();
	  }
	}
	
	Form.Element = {
	  serialize: function(element) {
		element = $(element);
		var method = element.tagName.toLowerCase();
		var parameter = Form.Element.Serializers[method](element);
	
		if (parameter) {
		  var key = encodeURIComponent(parameter[0]);
		  if (key.length == 0) return;
	
		  if (parameter[1].constructor != Array)
			parameter[1] = [parameter[1]];
	
		  return parameter[1].map(function(value) {
			return key + '=' + encodeURIComponent(value);
		  }).join('&');
		}
	  },
	
	  getValue: function(element) {
		element = $(element);
		var method = element.tagName.toLowerCase();
		var parameter = Form.Element.Serializers[method](element);
	
		if (parameter)
		  return parameter[1];
	  }
	}
	
	Form.Element.Serializers = {
	  input: function(element) {
		switch (element.type.toLowerCase()) {
		  case 'submit':
		  case 'hidden':
		  case 'password':
		  case 'text':
			return Form.Element.Serializers.textarea(element);
		  case 'checkbox':
		  case 'radio':
			return Form.Element.Serializers.inputSelector(element);
		}
		return false;
	  },
	
	  inputSelector: function(element) {
		if (element.checked)
		  return [element.name, element.value];
	  },
	
	  textarea: function(element) {
		return [element.name, element.value];
	  },
	
	  select: function(element) {
		return Form.Element.Serializers[element.type == 'select-one' ?
		  'selectOne' : 'selectMany'](element);
	  },
	
	  selectOne: function(element) {
		var value = '', opt, index = element.selectedIndex;
		if (index >= 0) {
		  opt = element.options[index];
		  value = opt.value || opt.text;
		}
		return [element.name, value];
	  },
	
	  selectMany: function(element) {
		var value = [];
		for (var i = 0; i < element.length; i++) {
		  var opt = element.options[i];
		  if (opt.selected)
			value.push(opt.value || opt.text);
		}
		return [element.name, value];
	  }
	}
	
	/*--------------------------------------------------------------------------*/
	
	var $F = Form.Element.getValue;
	
	/*--------------------------------------------------------------------------*/
	
	Abstract.TimedObserver = function() {}
	Abstract.TimedObserver.prototype = {
	  initialize: function(element, frequency, callback) {
		this.frequency = frequency;
		this.element   = $(element);
		this.callback  = callback;
	
		this.lastValue = this.getValue();
		this.registerCallback();
	  },
	
	  registerCallback: function() {
		setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
	  },
	
	  onTimerEvent: function() {
		var value = this.getValue();
		if (this.lastValue != value) {
		  this.callback(this.element, value);
		  this.lastValue = value;
		}
	  }
	}
	
	Form.Element.Observer = Class.create();
	Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
	  getValue: function() {
		return Form.Element.getValue(this.element);
	  }
	});
	
	Form.Observer = Class.create();
	Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
	  getValue: function() {
		return Form.serialize(this.element);
	  }
	});
	
	/*--------------------------------------------------------------------------*/
	
	Abstract.EventObserver = function() {}
	Abstract.EventObserver.prototype = {
	  initialize: function(element, callback) {
		this.element  = $(element);
		this.callback = callback;
	
		this.lastValue = this.getValue();
		if (this.element.tagName.toLowerCase() == 'form')
		  this.registerFormCallbacks();
		else
		  this.registerCallback(this.element);
	  },
	
	  onElementEvent: function() {
		var value = this.getValue();
		if (this.lastValue != value) {
		  this.callback(this.element, value);
		  this.lastValue = value;
		}
	  },
	
	  registerFormCallbacks: function() {
		var elements = Form.getElements(this.element);
		for (var i = 0; i < elements.length; i++)
		  this.registerCallback(elements[i]);
	  },
	
	  registerCallback: function(element) {
		if (element.type) {
		  switch (element.type.toLowerCase()) {
			case 'checkbox':
			case 'radio':
			  Event.observe(element, 'click', this.onElementEvent.bind(this));
			  break;
			case 'password':
			case 'text':
			case 'textarea':
			case 'select-one':
			case 'select-multiple':
			  Event.observe(element, 'change', this.onElementEvent.bind(this));
			  break;
		  }
		}
	  }
	}
	
	Form.Element.EventObserver = Class.create();
	Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
	  getValue: function() {
		return Form.Element.getValue(this.element);
	  }
	});
	
	Form.EventObserver = Class.create();
	Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
	  getValue: function() {
		return Form.serialize(this.element);
	  }
	});
	
	// =========
	// Form - E
	// =========
	
	
	
	
	// ==========
	// Event - S
	// ==========
	
	if(!window.Event) var Event = new Object();
	
	Object.extend(Event, {
	  KEY_BACKSPACE: 8,
	  KEY_TAB:       9,
	  KEY_RETURN:   13,
	  KEY_ESC:      27,
	  KEY_LEFT:     37,
	  KEY_UP:       38,
	  KEY_RIGHT:    39,
	  KEY_DOWN:     40,
	  KEY_DELETE:   46,
	
	  element: function(event) {
		return event.target || event.srcElement;
	  },
	
	  isLeftClick: function(event) {
		return (((event.which) && (event.which == 1)) ||
				((event.button) && (event.button == 1)));
	  },
	
	  pointerX: function(event) {
		return event.pageX || (event.clientX +
		  (document.documentElement.scrollLeft || document.body.scrollLeft));
	  },
	
	  pointerY: function(event) {
		return event.pageY || (event.clientY +
		  (document.documentElement.scrollTop || document.body.scrollTop));
	  },
	
	  stop: function(event) {
		if (event.preventDefault) {
		  event.preventDefault();
		  event.stopPropagation();
		} else {
		  event.returnValue = false;
		  event.cancelBubble = true;
		}
	  },
	
	  // find the first node with the given tagName, starting from the
	  // node the event was triggered on; traverses the DOM upwards
	  findElement: function(event, tagName) {
		var element = Event.element(event);
		while (element.parentNode && (!element.tagName ||
			(element.tagName.toUpperCase() != tagName.toUpperCase())))
		  element = element.parentNode;
		return element;
	  },
	
	  observers: false,
	
	  _observeAndCache: function(element, name, observer, useCapture) {
		if (!this.observers) this.observers = [];
		if (element.addEventListener) {
		  this.observers.push([element, name, observer, useCapture]);
		  element.addEventListener(name, observer, useCapture);
		} else if (element.attachEvent) {
		  this.observers.push([element, name, observer, useCapture]);
		  element.attachEvent('on' + name, observer);
		}
	  },
	
	  unloadCache: function() {
		if (!Event.observers) return;
		for (var i = 0; i < Event.observers.length; i++) {
		  Event.stopObserving.apply(this, Event.observers[i]);
		  Event.observers[i][0] = null;
		}
		Event.observers = false;
	  },
	
	  observe: function(element, name, observer, useCapture) {
		var element = $(element);
		useCapture = useCapture || false;
	
		if (name == 'keypress' &&
			(navigator.appVersion.match(/Konqueror|Safari|KHTML/)
			|| element.attachEvent))
		  name = 'keydown';
	
		this._observeAndCache(element, name, observer, useCapture);
	  },
	
	  stopObserving: function(element, name, observer, useCapture) {
		var element = $(element);
		useCapture = useCapture || false;
	
		if (name == 'keypress' &&
			(navigator.appVersion.match(/Konqueror|Safari|KHTML/)
			|| element.detachEvent))
		  name = 'keydown';
	
		if (element.removeEventListener) {
		  element.removeEventListener(name, observer, useCapture);
		} else if (element.detachEvent) {
		  element.detachEvent('on' + name, observer);
		}
	  }
	});
	
	/* prevent memory leaks in IE */
	if(navigator.appVersion.match(/\bMSIE\b/)) Event.observe(window, 'unload', Event.unloadCache, false);
	  
	// =============
	// Event - E
	// =============
			

	  
	  
	  
	  
	  
	// =============
	// Position - S
	// =============
	
	var Position = {
	  // set to true if needed, warning: firefox performance problems
	  // NOT neeeded for page scrolling, only if draggable contained in
	  // scrollable elements
	  includeScrollOffsets: false,
	
	  // must be called before calling withinIncludingScrolloffset, every time the
	  // page is scrolled
	  prepare: function() {
		this.deltaX =  window.pageXOffset
					|| document.documentElement.scrollLeft
					|| document.body.scrollLeft
					|| 0;
		this.deltaY =  window.pageYOffset
					|| document.documentElement.scrollTop
					|| document.body.scrollTop
					|| 0;
	  },
	
	  realOffset: function(element) {
		var valueT = 0, valueL = 0;
		do {
		  valueT += element.scrollTop  || 0;
		  valueL += element.scrollLeft || 0;
		  element = element.parentNode;
		} while (element);
		return [valueL, valueT];
	  },
	
	  cumulativeOffset: function(element) {
		var valueT = 0, valueL = 0;
		do {
		  valueT += element.offsetTop  || 0;
		  valueL += element.offsetLeft || 0;
		  element = element.offsetParent;
		} while (element);
		return [valueL, valueT];
	  },
	
	  positionedOffset: function(element) {
		var valueT = 0, valueL = 0;
		do {
		  valueT += element.offsetTop  || 0;
		  valueL += element.offsetLeft || 0;
		  element = element.offsetParent;
		  if (element) {
			p = Element.getStyle(element, 'position');
			if (p == 'relative' || p == 'absolute') break;
		  }
		} while (element);
		return [valueL, valueT];
	  },
	
	  offsetParent: function(element) {
		if (element.offsetParent) return element.offsetParent;
		if (element == document.body) return element;
	
		while ((element = element.parentNode) && element != document.body)
		  if (Element.getStyle(element, 'position') != 'static')
			return element;
	
		return document.body;
	  },
	
	  // caches x/y coordinate pair to use with overlap
	  within: function(element, x, y) {
		if (this.includeScrollOffsets)
		  return this.withinIncludingScrolloffsets(element, x, y);
		this.xcomp = x;
		this.ycomp = y;
		this.offset = this.cumulativeOffset(element);
	
		return (y >= this.offset[1] &&
				y <  this.offset[1] + element.offsetHeight &&
				x >= this.offset[0] &&
				x <  this.offset[0] + element.offsetWidth);
	  },
	
	  withinIncludingScrolloffsets: function(element, x, y) {
		var offsetcache = this.realOffset(element);
	
		this.xcomp = x + offsetcache[0] - this.deltaX;
		this.ycomp = y + offsetcache[1] - this.deltaY;
		this.offset = this.cumulativeOffset(element);
	
		return (this.ycomp >= this.offset[1] &&
				this.ycomp <  this.offset[1] + element.offsetHeight &&
				this.xcomp >= this.offset[0] &&
				this.xcomp <  this.offset[0] + element.offsetWidth);
	  },
	
	  // within must be called directly before
	  overlap: function(mode, element) {
		if (!mode) return 0;
		if (mode == 'vertical')
		  return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
			element.offsetHeight;
		if (mode == 'horizontal')
		  return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
			element.offsetWidth;
	  },
	
	  clone: function(source, target) {
		source = $(source);
		target = $(target);
		target.style.position = 'absolute';
		var offsets = this.cumulativeOffset(source);
		target.style.top    = offsets[1] + 'px';
		target.style.left   = offsets[0] + 'px';
		target.style.width  = source.offsetWidth + 'px';
		target.style.height = source.offsetHeight + 'px';
	  },
	
	  page: function(forElement) {
		var valueT = 0, valueL = 0;
	
		var element = forElement;
		do {
		  valueT += element.offsetTop  || 0;
		  valueL += element.offsetLeft || 0;
	
		  // Safari fix
		  if (element.offsetParent==document.body)
			if (Element.getStyle(element,'position')=='absolute') break;
	
		} while (element = element.offsetParent);
	
		element = forElement;
		do {
		  valueT -= element.scrollTop  || 0;
		  valueL -= element.scrollLeft || 0;
		} while (element = element.parentNode);
	
		return [valueL, valueT];
	  },
	
	  clone: function(source, target) {
		var options = Object.extend({
		  setLeft:    true,
		  setTop:     true,
		  setWidth:   true,
		  setHeight:  true,
		  offsetTop:  0,
		  offsetLeft: 0
		}, arguments[2] || {})
	
		// find page position of source
		source = $(source);
		var p = Position.page(source);
	
		// find coordinate system to use
		target = $(target);
		var delta = [0, 0];
		var parent = null;
		// delta [0,0] will do fine with position: fixed elements,
		// position:absolute needs offsetParent deltas
		if (Element.getStyle(target,'position') == 'absolute') {
		  parent = Position.offsetParent(target);
		  delta = Position.page(parent);
		}
	
		// correct by body offsets (fixes Safari)
		if (parent == document.body) {
		  delta[0] -= document.body.offsetLeft;
		  delta[1] -= document.body.offsetTop;
		}
	
		// set position
		if(options.setLeft)   target.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
		if(options.setTop)    target.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
		if(options.setWidth)  target.style.width = source.offsetWidth + 'px';
		if(options.setHeight) target.style.height = source.offsetHeight + 'px';
	  },
	
	  absolutize: function(element) {
		element = $(element);
		if (element.style.position == 'absolute') return;
		Position.prepare();
	
		var offsets = Position.positionedOffset(element);
		var top     = offsets[1];
		var left    = offsets[0];
		var width   = element.clientWidth;
		var height  = element.clientHeight;
	
		element._originalLeft   = left - parseFloat(element.style.left  || 0);
		element._originalTop    = top  - parseFloat(element.style.top || 0);
		element._originalWidth  = element.style.width;
		element._originalHeight = element.style.height;
	
		element.style.position = 'absolute';
		element.style.top    = top + 'px';;
		element.style.left   = left + 'px';;
		element.style.width  = width + 'px';;
		element.style.height = height + 'px';;
	  },
	
	  relativize: function(element) {
		element = $(element);
		if (element.style.position == 'relative') return;
		Position.prepare();
	
		element.style.position = 'relative';
		var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
		var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
	
		element.style.top    = top + 'px';
		element.style.left   = left + 'px';
		element.style.height = element._originalHeight;
		element.style.width  = element._originalWidth;
	  }
	}
	
	// Safari returns margins on body which is incorrect if the child is absolutely
	// positioned.  For performance reasons, redefine Position.cumulativeOffset for
	// KHTML/WebKit only.
	if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
	  Position.cumulativeOffset = function(element) {
		var valueT = 0, valueL = 0;
		do {
		  valueT += element.offsetTop  || 0;
		  valueL += element.offsetLeft || 0;
		  if (element.offsetParent == document.body)
			if (Element.getStyle(element, 'position') == 'absolute') break;
	
		  element = element.offsetParent;
		} while (element);
	
		return [valueL, valueT];
	  }
	}
	
	// =============
	// Position - E
	// =============