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;