How to disable a button once submit the form?

Hi guys,
I need to disable the button instantly once user submit their registration. Should I implement this using actionListener and ActionEvent? Pls help, Thanks !
regards,
kmthien

Speaking about the client-side, you can use cookies to stop the submission.
This is a simplest, but not too much intelligent example:
<script language="javascript">
         function preventDoubleSubmit() {
              if (document.cookie.indexOf('submitted')> -1)
                   return false;
                 document.cookie="submitted=yes";
</script>Note, that clicking the Refresh (or Back/Forward buttons) user has no more chance to receive the next page in the normal page flow.
Probably, the server-side way is more suitable for this situation. Search for 'postBack' on this forum. As I remember, it was a discussion here recently.

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