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;