function subnav(aID) {
		var x;
		x = document.getElementById(aID);
		if (x.style.visibility == 'visible')
		{
			x.style.visibility = 'hidden';
		}
		else
		{
			x.style.visibility = 'visible';
		}
		return;		
	}
	function subnav2(aID) {
		var x;
		x = document.getElementById(aID);
		if (x.style.display == 'none')
		{
			x.style.display = 'block';
		}
		else
		{
			x.style.display = 'none';
		}
		return;		
	}