activateMenu = function(nav) {
	
	if (document.all && document.getElementById(nav).currentStyle) {  
	
		var navroot = document.getElementById(nav);
		var lis=navroot.getElementsByTagName("LI");  
		
        for (i=0; i<lis.length; i++) {
        
            if(lis[i].lastChild.tagName=="UL"){
					
             	lis[i].onmouseover=function() {	
				
                   this.lastChild.style.display="block";
				   
                }	
				
                lis[i].onmouseout=function() {      
				
                   this.lastChild.style.display="none";
				   
				}
	
			}
	
		}
	
	}
	
}