function showLayer(whichLayer) {

			if (document.getElementById) {
			// this is the way the standards work
			document.getElementById(whichLayer).style.visibility = "visible";
			document.getElementById(whichLayer).style.display= "inline";
			}
			else if (document.all) {
			// this is the way old msie versions work
			document.all[whichlayer].style.visibility = "visible";
			document.all[whichlayer].style.display= "inline";
			}
			else if (document.layers) {
			// this is the way nn4 works
			document.layers[whichLayer].visibility = "visible";
			document.layers[whichLayer].display= "inline";
			}

		}

		function hideLayer(whichLayer) {

			if (document.getElementById) {
			// this is the way the standards work
			document.getElementById(whichLayer).style.visibility = "hidden";
			document.getElementById(whichLayer).style.display= "none";
			}
			else if (document.all) {
			// this is the way old msie versions work
			document.all[whichlayer].style.visibility = "hidden";
			document.all[whichlayer].style.display= "none";
			}
			else if (document.layers) {
			// this is the way nn4 works
			document.layers[whichLayer].visibility = "hidden";
			document.layers[whichLayer].display= "none";
			}

		}