function clickMenu(menu,id,root){
	if(root!=""){
		var aRoot=root.split(",");
		for(i=0;i<aRoot.length-1;i++){
			var elements = document.getElementById(aRoot[i]).getElementsByTagName('UL');
			for(var j = 0; j < elements.length; j++) {
				if(elements[j].parentNode.id == aRoot[0]) {
					if(elements[j].style.display == "none" || elements[j].style.display == ""){
						elements[j].style.display = "block";
					}
					else {
					   elements[j].style.display = "none";
					}
				}
				else {
					elements[j].style.display = 'none';
				}
			}
		}
    var b = document.getElementById(aRoot[1])
    if (b != null) {
      b.getElementsByTagName('UL')[0].style.display = 'block';
      //elements[j].parentNode.getElementsByTagName('UL')[0].style.display = 'block';
    };    
	}
	else {
		var element=document.getElementById(id).getElementsByTagName('UL')[0];
		if(element != null) {
			if(element.style.display=="none" || element.style.display=="") {
				element.style.display="block";
			}
			else {
		  	element.style.display="none";
			}
		}
	}
}