title: Checkbox change event not firing
body: <p>This is my code:</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
  &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.3/jquery.min.js"&gt;&lt;/script&gt;
  &lt;script&gt;
    $(document).ready(function() {
      $('.chk').live('change', function() {
        alert('change event fired');
      });
      $('a').click(function() {
        $('.chk').attr('checked', true);
      });
    });
  &lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;div class="chkHolder"&gt;
    &lt;input type="checkbox" class="chk" name="a" id="a" /&gt;
    &lt;input type="checkbox" class="chk" name="b" id="b" /&gt;
  &lt;/div&gt;
  &lt;a href="#"&gt;check all&lt;/a&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>When I click on the "check all" hyperlink, I want the change event fired for each of the checkboxes. However, that is not happening.</p>
  
  <p>Any ideas?</p>
  
  <p>Many thanks!</p>