// function $(id) {
// 	return document.getElementById(id);
// }

var previous_menu = "";
var menu_timer;
function menu(name) {

	if (name != "") {
		clearTimeout(menu_timer);
		
		//open het menu, en sluit het vorige
		if (name != previous_menu) {
			try {
				document.getElementById('children_'+previous_menu).style.display = 'none';
			} catch (E) {}
			try {
				document.getElementById('children_'+name).style.display = '';
			} catch (E) {}
			previous_menu = name;
		}
	}
	else {
		if (previous_menu != "") {
			id = 'children_'+previous_menu;
			if (document.getElementById(id) != null) {
				menu_timer = setTimeout("document.getElementById('"+id+"').style.display = 'none'; previous_menu = ''",500);
			}
		}
	}
}