// JScript File
function toggleLayer(whichLayer){
	var elem, vis;
	if(document.getElementById){
		// this is the way the standards work
		elem = document.getElementById( whichLayer );
	}else{
		if(document.all){
			// this is the way old msie versions work
			elem = document.all[whichLayer];
		}else{
			if(document.layers){
				// this is the way nn4 works
				elem = document.layers[whichLayer];
				vis = elem.style;
			}
		}
	}
	// if the style.display value is blank we try to figure it out here
	if(vis.display===''&&elem.offsetWidth!==undefined&&elem.offsetHeight!==undefined){
		vis.display = (elem.offsetWidth!==0&&elem.offsetHeight!==0)?'block':'none';
		vis.display = (vis.display===''||vis.display=='block')?'none':'block';
	}
}