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'); 
			}