function toggleLayer(whichLayer) {
				if (document.getElementById) {
					var style2 = document.getElementById(whichLayer).style;
					style2.display = style2.display? "":"block";
				} else if (document.all) {
					var style2 = document.all[whichLayer].style;
					style2.display = style2.display? "":"block";
				} else if (document.layers) {
					var style2 = document.layers[whichLayer].style;
					style2.display = style2.display? "":"block";
				}
			}