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