title: data-loading-text not working
body: <p>I want have have a "<code>Loading. . .</code>" whenever I click on the "<code>Submit</code>" button. In this case, how come it did not display the "<code>Loading. . .</code>" thingy? bootstrap 2.3.2</p>
  
  <pre><code>&lt;input type="submit" data-loading-text="Loading..." disabled="disabled" style="" id="save" class="btn btn-primary " value="Submit" name="save"&gt;
  </code></pre>
  
  <p>Here's my JS:</p>
  
  <pre><code>$('#save').click(function() {
      var btn = $(this);
      btn.button('loading');
      btn.button('reset');
  });
  </code></pre>
  
  <p>I can't find any error in console either. What did I miss?</p>