function CloseMenu()
{
    for (var i = 1; document.getElementById('SubMenu_' + i); i++)
    {
	document.getElementById('SubMenu_' + i).style.display = 'none';
    }
}

function ShowMenu(Id)
{
    var d = document.getElementById(Id);
    for (var i = 1; document.getElementById('SubMenu_' + i); i++)
    {
	document.getElementById('SubMenu_' + i).style.display = 'none';
    }
    if (d)
    {
	d.style.display = 'block';
    }
}