function activateMenu(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";
    }
   }
  }
 }
}