var opened, openWindow;
  opened = false;
  
  function doPop(h,w,f,t) {
    if (opened) {
      if (!openWindow.closed) { openWindow.close(); }
    }
    openWindow = window.open(f,"popup001","height="+h+",width="+w+",resizable=no,scrollbars="+t+", toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=no")
    opened = true
  }