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";
				}
			}
		}
	}
}

//document.onkeypress=keypress;
window.onload= function(){
    /* pass the function the id of the top level UL */
    /* remove one, when only using one menu */
    activateMenu('vertnav'); 
}