var w = window;
      function openWin(url) {
         if ((w == window) || w.closed) {
            w = open(url,"schedule","width=900,height=650,scrollbars=yes,resizable=yes,toolbar=no");
} else {
            w.focus();
            w = open(url,"schedule","width=900,height=650,scrollbars=yes,resizable=yes,toolbar=no");
         }
         return(false);
            }