function ToggleLeftMenuItem(item) {
	var subname = item.id + "_submenu";
	var submenu = document.getElementById(subname);
	if (item.parentNode.className=="node_closed") {
		item.parentNode.className="node_open";
		submenu.style.display="";
	} else {
		item.parentNode.className= "node_closed";
		submenu.style.display="none";
	}	
}