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;