function getEle(whichLayer) {
	if (document.getElementById)
	{
	// this is the way the standards work
			var style2 = document.getElementById(whichLayer);
	}
	else if (document.all)
	{
			// this is the way old msie versions work
			var style2 = document.all[whichLayer];
	}
	else if (document.layers)
	{
			// this is the way nn4 works
			var style2 = document.layers[whichLayer];
	}
	return style2;
}

function toggleLayer(whichLayer)
{
	style2 = getEle(whichLayer).style;
	if (style2) {
		if (style2.display=="none") {
			style2.display ="block";
		} else {
			style2.display ="none";										   
		}
	}
}