/**
 *  Prototype JavaScript framework by Sam Stephenson (http://prototype.conio.net)
 *  Modified by Michael Bertsch (http://michaelbertsch.eu)
 */
var Class = {
create: function() {
return function() {
this.initialize.apply(this, arguments);
}
}
}

Object.extend = function(destination, source) {
  for (property in source) {
    destination[property] = source[property];
  }
  return destination;
}

Function.prototype.bind = function(object) {
var __method = this;
return function() {
return __method.apply(object, arguments);
}
}

Function.prototype.bindAsEventListener = function(object) {
var __method = this;
return function(event) {
__method.call(object, event || window.event);
}
}

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;
  }
}

function $() {
  var results = [], element;
  for (var i = 0; i < arguments.length; i++) {
    element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);
    results.push(element);
  }
  return results.length < 2 ? results[0] : results;
}

var $A = Array.from = function(iterable) {
  if (!iterable) return [];
    var results = [];
    for (var i = 0; i < iterable.length; i++)
      results.push(iterable[i]);
    return results;
}

document.getElementsByClassName = function(className) {
var all_elements = document.getElementsByTagName('*') || document.all;
var elements = [];
for(var i=0; i<all_elements.length;i++) {
if (Element.hasClassName(all_elements[i], className)) {
elements.push(all_elements[i]);
}
}
return elements;
}


if (!window.Element) var Element = new Object();

Object.extend(Element, {
remove: function(element) {
element = $(element);
element.parentNode.removeChild(element);
},

hasClassName: function(element, className) {
element = $(element);
if (!element) return;
var hasClass = false;
element.className.split(' ').each(function(cn){
if (cn == className) hasClass = true;
});
return hasClass;
},

addClassName: function(element, className) {
element = $(element);
Element.removeClassName(element, className);
element.className += ' ' + className;
},
  
removeClassName: function(element, className) {
element = $(element);
if (!element) return;
var newClassName = '';
element.className.split(' ').each(function(cn, i){
if (cn != className){
if (i > 0) newClassName += ' ';
newClassName += cn;
}
});
element.className = newClassName;
}
});

var Position = {
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];
}
};

Array.prototype.each = function(func) {
for(var i=0;i<this.length;i++) {
func(this[i], i);
}
}

Ajax = Class.create();
Ajax.prototype = {
initialize: function(url, options){
this.transport = this.getTransport();
this.postBody = options.postBody || '';
this.method = options.method || 'post';
this.onComplete = options.onComplete || null;
this.update = $(options.update) || null;
this.request(url);
},

request: function(url){
this.transport.open(this.method, url, true);
this.transport.onreadystatechange = this.onStateChange.bind(this);
if (this.method == 'post') {
this.transport.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
if (this.transport.overrideMimeType) this.transport.setRequestHeader('Connection', 'close');
}
this.transport.send(this.postBody);
},

onStateChange: function(){
if (this.transport.readyState == 4 && this.transport.status == 200) {
if (this.onComplete) 
setTimeout(function(){this.onComplete(this.transport);}.bind(this), 10);
if (this.update)
setTimeout(function(){this.update.innerHTML = this.transport.responseText;}.bind(this), 10);
this.transport.onreadystatechange = function(){};
}
},

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

if (!window.Event) var Event = new Object();

Object.extend(Event, {
  element: function(event) {
    return event.target || event.srcElement;
  },
  
  stop: function(event) {
    if (event.preventDefault) {
      event.preventDefault();
      event.stopPropagation();
    } else {
      event.returnValue = false;
      event.cancelBubble = true;
    }
  },

  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 */
Event.observe(window, 'unload', Event.unloadCache, false);