startList = function() {

		if (document.all && document.getElementById) {
			var navRoot = document.getElementById("nav")
			var childNodes = navRoot.getElementsByTagName("LI");
			for (var i=0; i < childNodes.length ; i++) {
				node = childNodes[i];
				if (node.nodeName=="LI") {
					node.onmouseover=function() {
						this.className+=" over";
				  }
				  node.onmouseout=function() {
				  	this.className=this.className.replace(" over", "");
				  }
				}
			}	
		}
}
window.onload=startList;