var thistarget = "none";
function toggle (targetId)
	{
		if (document.getElementById)
				{
					if (thistarget != targetId && thistarget != "none")
						{
							target = document.getElementById ( thistarget );
							target.style.display = "none";
						}
					thistarget = targetId;
					target = document.getElementById ( targetId );
					if (target.style.display == "none")
						{
						target.style.display = "";
						}
					else
						{
							target.style.display = "none";
						}
				}
	}