var w = window;

function openWin(url,ww,hh) {
   if ((w == window) || w.closed) {
      w = open(url, "_blank", "width="+ww+",height="+hh+",resizable=yes,scrollbars=no,toolbar=no,location=no,status=no,directories=no");
   } else {
      w.focus();
   }
   return(false);
}