startList = function() {
   if (document.all&&document.getElementById) {
      navRoot = document.getElementById("nav");
      if (navRoot != null) {
         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;