// written by Dean Edwards, 2005
// with input from Tino Zijdel - crisp@xs4all.nl
// http://dean.edwards.name/weblog/2005/10/add-event/
function addEvent(element, type, handler)
{
    if (element.addEventListener)
        element.addEventListener(type, handler, false);
    else
    {
        if (!handler.$$guid) handler.$$guid = addEvent.guid++;
        if (!element.events) element.events = {};
        var handlers = element.events[type];
        if (!handlers)
        {
            handlers = element.events[type] = {};
            if (element['on' + type]) handlers[0] = element['on' + type];
            element['on' + type] = handleEvent;
        }

        handlers[handler.$$guid] = handler;
    }
}
addEvent.guid = 1;

function removeEvent(element, type, handler)
{
    if (element.removeEventListener)
        element.removeEventListener(type, handler, false);
    else if (element.events && element.events[type] && handler.$$guid)
        delete element.events[type][handler.$$guid];
}

function handleEvent(event)
{
    event = event || fixEvent(window.event);
    var returnValue = true;
    var handlers = this.events[event.type];

    for (var i in handlers)
    {
        if (!Object.prototype[i])
        {
            this.$$handler = handlers[i];
            if (this.$$handler(event) === false) returnValue = false;
        }
    }

    if (this.$$handler) this.$$handler = null;

    return returnValue;
}

function fixEvent(event)
{
    event.preventDefault = fixEvent.preventDefault;
    event.stopPropagation = fixEvent.stopPropagation;
    return event;
}
fixEvent.preventDefault = function()
{
    this.returnValue = false;
}
fixEvent.stopPropagation = function()
{
    this.cancelBubble = true;
}

// This little snippet fixes the problem that the onload attribute on the body-element will overwrite
// previous attached events on the window object for the onload event
if (!window.addEventListener)
{
    document.onreadystatechange = function()
    {
        if (window.onload && window.onload != handleEvent)
        {
            addEvent(window, 'load', window.onload);
            window.onload = handleEvent;
        }
    }
}


// Should be moved to its own js file.
function ScriptLoader() {
  this.scripts = new Array();
}

ScriptLoader.prototype.init = function(vals) {
  this.scripts = vals;
}


// Loads scripts
ScriptLoader.prototype.load = function() {
  for (var i=0; i<this.scripts.length; i++) {
    this.loadScript(this.scripts[i]);
  }
}

ScriptLoader.prototype.loadScript = function(scriptName) {
  var scriptNode = document.createElement("script");
  scriptNode.src = scriptName;
  scriptNode.type = "text/javascript";
  var head = document.getElementsByTagName("head").item(0);head.appendChild(scriptNode);
  head.appendChild(scriptNode);
}

var scriptLoader = new ScriptLoader();
var aScripts = new Array();
aScripts.push("/js/ads/adLayer.js");
scriptLoader.init(aScripts);
scriptLoader.load();
aScripts = null;