function openMenu(list){
	var sub = list.getElementsByTagName("ul");
	for (var i=0; i<sub.length; i++){
		if (sub[i].style.display=="none"){
			sub[i].style.display = "";
			list.style.backgroundImage = "url(fileadmin/templates/img/arrow-bottom.png)";
			list.style.backgroundPosition = "0px 6px";
		}else{
			sub[i].style.display = "none";
			list.style.backgroundImage = "url(fileadmin/templates/img/arrow-left.png)";
			list.style.backgroundPosition = "0px 2px";
		}
	}
}