var 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('navigation'); 
     //activateMenu('vertnav'); 
 }