function toggleVisibility(objectid, value)
{
	document.getElementById(objectid).style.visibility = value;
}

function toggleLayer(whichLayer)

{

	if (document.getElementById)

	{

		//IE en FIREFOX

		var style2 = document.getElementById(whichLayer).style;

		if (style2.display == "none")

		{

			style2.display = style2.display? "":"block";

		}

		else

		{

			style2.display = style2.display? "":"none";

		}

	}

	else if (document.all)

	{

		// oude IE browsers

		var style2 = document.all[whichLayer].style;

		if (style2.display == "none")

		{

			style2.display = style2.display? "":"block";

		}

		else

		{

			style2.display = style2.display? "":"none";

		}

	}

	else if (document.layers)

	{

		// NETSCAPE

		var style2 = document.layers[whichLayer].style;

		if (style2.display == "none")

		{

			style2.display = style2.display? "":"block";

		}

		else

		{

			style2.display = style2.display? "":"none";

		}

	}

}