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;