function toggleMenu(id) {
	var node = document.getElementById(id);
	var status = node.style.display;
	var nodes = document.getElementsByTagName('ul');
	for (var i = 0; i < nodes.length; i++) {
		if (nodes[i].getAttribute('class') == 'subMenu' || nodes[i].getAttribute('className') == 'subMenu') {
			nodes[i].style.display = 'none';
			nodes[i].style.visibility = 'hidden';
		}
	}
	if (status == 'none') {
		node.style.display = 'block';
		node.style.visibility = 'visible';
	} else {
		node.style.display = 'none';
		node.style.visibility = 'hidden';		
	}
}
function toggleMenuItem(imgNode, show) {
	if (imgNode && imgNode.parentNode && imgNode.parentNode.parentNode && imgNode.parentNode.parentNode.nodeName == 'LI') {
		// image
		imgNode.src = (show ? imgNode.src.replace(/\/menu\//, '/menu-active/') : imgNode.src.replace(/\/menu-active\//, '/menu/'));
		// arrow
		imgNode.parentNode.parentNode.style.listStyleImage = "url('images/menu-arrow" + (show ? '' : '-blind') + ".gif')";
	}
}