activateMenu = function(nav) {

	var navroot = document.getElementById(nav);
  /* currentStyle restricts the Javascript to IE only */
  if (!navroot || !navroot.currentStyle || !document.all) return;
        
			/* 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";
							}
					}
			}
}