window.onload = function() {
            // Work the menus
            var navigation = document.getElementById("mainNavigation");
            navChildren = navigation.childNodes;
            //var lis = navigation.getElementsByTagName("li");
            for(var i=0; i<navChildren.length; i++) {
                if(navChildren[i].nodeName.toLowerCase() == "li") {
                    addEvent(navChildren[i], "mouseover", function() {
                        this.className = "over";                        
                        if(this.getElementsByTagName("ul").length > 0)
                            this.getElementsByTagName("ul")[0].style.display = "block";
                    });

                    addEvent(navChildren[i], "mouseout", function() {
                        this.className = "";
                        if(this.getElementsByTagName("ul").length > 0)
                            this.getElementsByTagName("ul")[0].style.display = "none";
                    });
                }
            }            
        }
        function addEvent( obj, type, fn ) {
    if ( obj.attachEvent ) {
        obj['e'+type+fn] = fn;
        obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
        obj.attachEvent( 'on'+type, obj[type+fn] );
    } else
        obj.addEventListener( type, fn, false );
}

function addClass(element, className)
 {
	if (!hasClass(element, className))
	 {
		if (element.className) element.className += " " + className;
		else element.className = className;
	}
}

function removeClass(element, className)
 {
	var regexp = new RegExp("(^|\\s)" + className + "(\\s|$)");
	element.className = element.className.replace(regexp, "$2");
}

function hasClass(element, className)
 {
	var regexp = new RegExp("(^|\\s)" + className + "(\\s|$)");
	return regexp.test(element.className);
}

var PreSimpleSwapOnload =(window.onload)? window.onload : function(){};
window.onload = function(){PreSimpleSwapOnload(); SimpleSwapSetup();}

function SimpleSwap(el,which){
        el.src=el.getAttribute(which||"origsrc");
}

function SimpleSwapSetup(){
  var x = document.getElementsByTagName("img");
  for (var i=0;i<x.length;i++){
    var oversrc = x[i].getAttribute("oversrc");
    if (!oversrc) continue;
    // preload image
    // comment the next two lines to disable image pre-loading
    x[i].oversrc_img = new Image();
    x[i].oversrc_img.src=oversrc;
    // set event handlers
    x[i].onmouseover = new Function("SimpleSwap(this,'oversrc');");
    x[i].onmouseout = new Function("SimpleSwap(this);");
    // save original src
    x[i].setAttribute("origsrc",x[i].src);
  }
}