activateMenu = function(nav)
  {
              /* currentStyle restricts the Javascript to IE only */
    if (document.all && document.getElementById(nav).currentStyle)
      {
         var navroot = document.getElementById(nav);

              /* Get all the list items within the menu */
         var lis=navroot.getElementsByTagName("LI");
         for (i=0; i<lis.length; i++)
           {
               /* If the LI has another menu level */
             if(lis[i].lastChild.tagName=="UL")
               {
                    /* assign the function to the LI */
                 lis[i].onmouseover=function()
                   {
                        /* display the inner menu */
                     this.lastChild.style.display="block";
                   }
                 lis[i].onmouseout=function()
                   {
                     this.lastChild.style.display="none";
                   }
               }
           }
       }
  }

//window.onload= function()
//{
    /* pass the function the id of the top level UL */
    /* remove one, when only using one menu */
   // activateMenu('nav');
   // activateMenu('vertnav');
//}