function treeMenu_init(menu, data) {
	var array = new Array(0);
	if(data != null && data != "") {
		array = data.match(/\d+/g);
	}
	var items = menu.getElementsByTagName("li");
	for(var i = 0; i < items.length; i++) {
		items[i].onclick = treeMenu_handleClick;
		if(!treeMenu_contains(treeMenu_getClasses(items[i]), "treeMenu_opened") && items[i].getElementsByTagName("ul").length > 0) {
			var classes = treeMenu_getClasses(items[i]);
			if(array.length > 0 && array[0] == i) {
				classes.push("treeMenu_opened")
			}
			else {
				classes.push("treeMenu_closed")
			}
			items[i].className = classes.join(" ");
		}
		if(array.length > 0 && array[0] == i) {
			array.shift();
		}
	}
}

function treeMenu_handleClick(event) {
	if(event == null) { //Workaround für die fehlenden DOM Eigenschaften im IE
		event = window.event;
		event.currentTarget = event.srcElement;
		while(event.currentTarget.nodeName.toLowerCase() != "li") {
			event.currentTarget = event.currentTarget.parentNode;
		}
		event.cancelBubble = true;
	}
	else {
		event.stopPropagation();
	}
	var array = treeMenu_getClasses(event.currentTarget);
	for(var i = 0; i < array.length; i++) {
		if(array[i] == "treeMenu_closed") {
			array[i] = "treeMenu_opened";
		}
		else if(array[i] == "treeMenu_opened") {
			array[i] = "treeMenu_closed"
		}
	}
	event.currentTarget.className = array.join(" ");
}

function treeMenu_getClasses(element) {
	if(element.className) {
		return element.className.match(/[^ \t\n\r]+/g);
	}
	else {
		return new Array(0);
	}
}

function treeMenu_contains(array, element) {
	for(var i = 0; i < array.length; i++) {
		if(array[i] == element) {
			return true;
		}
	}
	return false;
}

function treeMenu_store(menu) {
	var result = new Array();;
	var items = menu.getElementsByTagName("li");
	for(var i = 0; i < items.length; i++) {
		if(treeMenu_contains(treeMenu_getClasses(items[i]), "treeMenu_opened")) {
			result.push(i);
		}
	}
	return result.join(" ");
}