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('vertnav'); 
	}