startList = function() 
{ 
  if (document.all&&document.getElementById)
    { 
       var navRoot = document.getElementById("main"); 
       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;