function openMenu(elt)
{
	uls = elt.getElementsByTagName('ul');
	for(i=0; i<uls.length; i++)
	{
		uls[i].style.display='block';
	}
}
function closeMenu(elt)
{
	uls = elt.getElementsByTagName('ul');
	for(i=0; i<uls.length; i++)
	{
		uls[i].style.display='none';
	}
}
function initMenu(id)
{
	document.getElementById(id).onmouseover = function() { openMenu(this) };
	document.getElementById(id).onmouseout = function() { closeMenu(this) };
	closeMenu(document.getElementById(id));
}