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";
                }
            }
        }
    }
}

// compatibility code for ie browsers multiple onloads
if (document.all) {
	window.attachEvent('onload',function(){
		activateMenu('vertnav');
	});  
}
else {
	window.onload= function(){
	    activateMenu('vertnav');		
	}
}