function showSub (elementId) {
	hideAll();
	var navList = document.getElementById(elementId);
	if (navList) {
		navList.style.display = 'block';
	}
}

function hideAll() {
	var allList = document.getElementsByTagName('ul');
	for (i = 0; i < allList.length; i++) {
		if (allList[i].className == 'level1') {
			allList[i].style.display = 'none';
		}
	}
}