function pop (URL,windowName,widthV,heightV) {
	if (widthV==null) widthV="800";
	if (heightV==null) heightV="600";
	window.open (URL,windowName,'width='+widthV+',height='+heightV+',location=0,menubar=0,scrollbars=1,status=0,toolbar=0,resizable=0,left=250,top=40');
	}