title: Twitter Bootstrap Alert won't close
body: <p>I'm using the Twitter Bootstrap Framework for some design parts od my page.</p>
  
  <p>I try to set up an alert that can be closed. My code looks just like that:</p>
  
  <pre><code>&lt;div id="index-alert" class="alert alert-danger .alert-dismissible"&gt;
      &lt;button type="button" class="close" data-dismiss="alert"&gt;&lt;span aria-hidden="true"&gt;&amp;times;&lt;/span&gt;&lt;span class="sr-only"&gt;Close&lt;/span&gt;&lt;/button&gt;
      &lt;b&gt;An Error occured&lt;/b&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>There is an X at the upper right corner that's clickable, but nothing happens.</p>
  
  <p>The firebug console doesn't give me any errors either.</p>
  
  <p>I'm using the Bootstrap Version 3.2.0</p>
  
  <p>Does anybody know what i'm doing wrong?</p>