window.onload = function() {
	var nodes = document.getElementById("menu").childNodes;
	var show_next_section = false;
	for (var i = 0; i < nodes.length; i++) {
		if (nodes[i].className == "MenuSectionHeader") {
			nodes[i].onclick = MenuSectionHeader_OnClick;
		} else if (nodes[i].className == "MenuActiveParent") {
			nodes[i].onclick = MenuSectionHeader_OnClick;
			show_next_section = true;
		} else if (show_next_section && nodes[i].className == "Section") {
			nodes[i].style.display = 'block';
			show_next_section = false;
		} else if (!show_next_section && nodes[i].className == "Section") {
			nodes[i].style.display = 'none';
		}
	}
}

function MenuSectionHeader_OnClick(e) {
	var nodes = document.getElementById("menu").childNodes;
	var trouve = false;
	for (var i = 0; i < nodes.length; i++) {
		if (nodes[i] == this) {
			trouve = true;
		} else if (trouve && nodes[i].className == "MenuSectionHeader") {
			trouve = false;
		} else if (trouve && nodes[i].className == "Section") {
			if (nodes[i].style.display == 'none')
				nodes[i].style.display = 'block';
			else
				nodes[i].style.display = 'none';
			trouve = false;
		} else if (!trouve && nodes[i].className == "Section") {
			nodes[i].style.display = 'none';
		}
	}
}