function menuSwich(id){
		var menu = document.getElementById(id);
		var dip;
		if(!menu)return;
		hideAll();
		if(menu.style.display=="none"){
			dip = "block";
		}else{
			dip = "none";
		}
		menu.style.display=dip;
	}
	function hideAll(){
		var i;
		var tagname ="div";
		var classname = "list";
		var tags = document.getElementsByTagName(tagname);
		if(!tags)return;
		for(i=0;i<tags.length;i++){
			if(tags[i].className==classname){
				tags[i].style.display = "none";
			}
		}
	}