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