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" || lis[i].lastChild.tagName=="ul"){
		    /* assign the function to the LI */
		    lis[i].onmouseover=function() {
			/* display the inner menu */
			if (this.lastChild.style) {
				this.lastChild.style.display="block";
			}
		    }
		    lis[i].onmouseout=function() {                       
			if (this.lastChild.style) {
				this.lastChild.style.display="none";
			}
		    }
		} else {
		    /* assign the function to the LI */
		    lis[i].onmouseover=function() {
			/* display the inner menu */
			if (this.lastChild.style) {
				this.lastChild.style.display="block";
			}
		    }
		}
	    }
	}
}

window.onload= function(){
    // activateMenu('nav'); /* pass in the id of the top level UL */
    activateMenu('vertnav'); 
}