var currentOpenMenu = 0; // Menu's lopen van 1 t/m 5, 0=geen menu

function closeCurrentOpenMenu()
{
	if (currentOpenMenu > 0)  
	{
		document.getElementById('ctl00_subMenu' + currentOpenMenu).style.display = 'none';
		currentOpenMenu = 0;
	}
}

function openMenu(menuNr) 
{
	if (menuNr == currentOpenMenu) 
	{
		closeCurrentOpenMenu();
	} else {
		closeCurrentOpenMenu();
		document.getElementById('ctl00_subMenu' + menuNr).style.display = 'inline';
		currentOpenMenu = menuNr;
	}
	return false;
}