function showSubMenu(containerId) {
	var anchors = containerId.getElementsByTagName("ul");
	
	try
	{
		anchors[0].style.display = "block";
	}
	catch(e) { }
}

function hideSubMenu(containerId) {
	var anchors = containerId.getElementsByTagName("ul");

	try
	{
		anchors[0].style.display = "none";
	}
	catch(e) { }
}