title: Jquery prevent multiple submit
body: <p>I want to prevent multiple submit if someone click on one of the submit buttons multiple times.</p>
  
  <p>How can <code>unbind</code> or <code>undelgate</code> in this case the call of my custom function <code>do_some_stuff</code> that is only happens one time, because I try some of the jquery methods, but I think I did something wrong. Thanks</p>
  
  <pre><code>$(function() {
      $('div.ajax').delegate('form button', 'click', function(e) {
          $(this).do_some_stuff();
          e.preventDefault();
      });
  });
  </code></pre>