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;