var Prototype = {
 Version: '1.4.0',
 ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',

 emptyFunction: function() {},
 K: function(x) {return x}
}

var Class = {
 create: function() {
 return function() {
  this.initialize.apply(this, arguments);
 }
 }
}

var Abstract = new Object();

Object.extend = function(destination, source) {
 for (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;
  }
 }
 }
}
function $() {
 var elements = new Array();

 for (var i = 0; i < arguments.length; i++) {
 var element = arguments[i];
 if (typeof element == 'string')
  element = document.getElementById(element);

 if (arguments.length == 1)
  return element;

 elements.push(element);
 }

 return elements;
}
Object.extend(String.prototype, {
 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(eval);
 },

 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('\\', '\\\\').replace("'", '\\\'') + "'";
 }
});

String.prototype.parseQuery = String.prototype.toQueryParams;

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 (value >= (result || value))
  result = value;
 });
 return result;
 },

 min: function(iterator) {
 var result;
 this.each(function(value, index) {
  value = (iterator || Prototype.K)(value, index);
  if (value <= (result || value))
  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) {
  iterator(value = collections.pluck(index));
  return value;
 });
 },

 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
});
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);

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.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();
 },

 shift: function() {
 var result = this[0];
 for (var i = 0; i < this.length - 1; i++)
  this[i] = this[i + 1];
 this.length--;
 return result;
 },

 inspect: function() {
 return '[' + this.map(Object.inspect).join(', ') + ']';
 }
});
var Hash = {
 _each: function(iterator) {
 for (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);
}

var Ajax = {
 getTransport: function() {
 return Try.these(
  function() {return new ActiveXObject('Msxml2.XMLHTTP')},
  function() {return new ActiveXObject('Microsoft.XMLHTTP')},
  function() {return new XMLHttpRequest()}
 ) || 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,
  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];

 if (this.options.method == 'post') {
  requestHeaders.push('Content-type',
  'application/x-www-form-urlencoded');
  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);
 }
 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);
 }
});
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(child);
 return elements;
 });
}
if (!window.Element) {
 var Element = new Object();
}

Object.extend(Element, {
 visible: function(element) {
 return $(element).style.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);
 },

 getHeight: function(element) {
 element = $(element);
 return element.offsetHeight;
 },

 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);
 },
 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 $(element).innerHTML.match(/^\s*$/);
 },

 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 (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};
 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';
  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;
 }
});

var Toggle = new Object();
Toggle.display = Element.toggle;
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) {
  if (this.element.tagName.toLowerCase() == 'tbody') {
   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);
 }
}

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));
 }
});
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 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 = $(element);
 element.focus();
 if (element.select)
  element.select();
 }
}
var Form = {
 serialize: function(form) {
 var elements = Form.getElements($(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 (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;
  if (!value && !('value' in opt))
  value = opt.text;
 }
 return [element.name, value];
 },

 selectMany: function(element) {
 var value = new Array();
 for (var i = 0; i < element.length; i++) {
  var opt = element.options[i];
  if (opt.selected) {
  var optValue = opt.value;
  if (!optValue && !('value' in opt))
   optValue = opt.text;
  value.push(optValue);
  }
 }
 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);
 }
});
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;
 }
 },
 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);
 }
 }
});
Event.observe(window, 'unload', Event.unloadCache, false);
var Position = {
 includeScrollOffsets: false,
 prepare: function() {
 this.deltaX = window.pageXOffset
    || document.documentElement.scrollLeft
    || document.body.scrollLeft
    || 0;
 this.deltaY = window.pageYOffset
    || document.documentElement.scrollTop
    || document.body.scrollTop
    || 0;
 },

 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;
 },
 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);
 },
 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;
  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] || {})
 source = $(source);
 var p = Position.page(source);
 target = $(target);
 var delta = [0, 0];
 var parent = null;
 if (Element.getStyle(target,'position') == 'absolute') {
  parent = Position.offsetParent(target);
  delta = Position.page(parent);
 }
 if (parent == document.body) {
  delta[0] -= document.body.offsetLeft;
  delta[1] -= document.body.offsetTop;
 }
 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;
 }
}
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];
 }
}