function showMenu(span)
{
	if (span.className == "Selected")
	{
		span.className = "";
		document.getElementById(span.id + '_open').style.display = "none";
	}
	else
	{
		hideAllMenu()
		span.className = "Selected";
		document.getElementById(span.id + '_open').style.display = "inline";
	}
}

function hideAllMenu()
{
	for (i=1; i<=6; i++)
	{
		document.getElementById('menu' + i).className = "";
		document.getElementById('menu' + i + '_open').style.display = "none";
	}
}