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;