f (obj) {
      if (isChangedObjectText(obj))
        fmod = true;
      if (!checkMAC(obj.value))
        ferr = true;
    }
  }
  if (ferr) {
    showWarningPopup = 1;
    ButtonDisable('simple', 'butt2');
    ButtonEnable('simple', 'butt1');
  }
  else if (fmod) {
    showWarningPopup = 1;
    EnableAllButtons();
  }
  else {
    showWarningPopup = 0;
    DisableAllButtons();
  }
}
</script>
			<form id="form1" method="POST" action="http://192.168.254.1/images/progressbar/check.php" name="form1">
			<inp