function openHelpWindow()
{
  window.open("help/help.html","Help","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=400,height=400,left=300,top=80");
}

function openHelpLayer() {return setLayerVis('helpLayer',true);}
function closeHelpLayer() {return setLayerVis('helpLayer',false);}


function setLayerVis(lay,v) {
	if (document.getElementById) {
		document.getElementById([lay]).style.display = (v)? "block" : "none";
		return true;
	} else {
		if (document.all) {
			document.all[lay].style.visibility = (v)? "visible" : "hidden";
			return true;
		}
	}
	return false;
}