lastOpened = null;

function openMenu(pElement){
	if (lastOpened != null) lastOpened.style.display="none"; 

	var id = pElement.attributes['href'].value;
	id = id.substr(id.indexOf("#")+1);
	var menu = document.getElementById(id);
	menu.style.display="block"; 
	lastOpened = menu;
	return false;
}

function closeMenu(pElement){
	pElement.parentNode.style.display="none"; 
	lastOpened = null;
	return false;
}