var ready = false;
    function popWin(fn) {
       var info = "width=300,height=230,left=5,top=5,menubar=no,location=no,directories=no,scrollbars=no";
        if (ready) {
            sw = window.open(fn, "window01", info);
        }
        if (sw != null && sw.opener == null) {
          sw.opener = self;
        }
}