function find_pos_y(obj)
{
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
	{
		curtop += obj.y;
	}
	return curtop;
}

function show_nav_subs(id)
{
	document.getElementById("menuSubs" + id).style.display = (document.getElementById("menuSubs" + id).style.display == "none") ? 'block' : 'none';
}