function addEvent( obj, type, fn )
{

	if (obj.addEventListener)
		obj.addEventListener( type, fn, false );

	else 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] );
	}

}

startList = function() {
	if (document.all&&document.getElementById) {
		
		navRoot = document.getElementById("nav");
		navLists = navRoot.getElementsByTagName("li");
		
		// begin nav
		for (i=0; i<navLists.length; i++) {	

			node = navLists[i];
			
			if (node.nodeName=="LI") {		
				node.onmouseover=function() {
					this.className+=" over";
				}
				node.onmouseout=function() {
					this.className=this.className.replace(" over", "");
				}
			}
					
		}
				
	}
}
addEvent(window,'load',startList,false);