function toggleVisibility(id)
	{
		if (document.getElementById(id).style.visibility == "hidden")
		{
			document.getElementById(id).style.visibility = "visible";
			document.getElementById(id).style.display = "block";
		}
		else
		{
			document.getElementById(id).style.visibility = "hidden";
			document.getElementById(id).style.display = "none";
		}
	}