function openwin(tgt,wname,ww,wh) {
	hdl = window.open(tgt,wname,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,titlebar=no,width='+ww+',height='+wh+',screenX=0,screenY=0,left=0,top=0');
	hdl.focus();
}