title: label not working with checkbox
body: <p>OK, what am I missing?
  I have:</p>
  
  <pre><code>&lt;form&gt;
      &lt;input type="checkbox" name="showRatings" value="1" checked&gt;
      &lt;label for="showRatings"&gt;Show Ratings&lt;/label&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>And when I click on the "Show Ratings" text, the checkbox is not toggling.
  I know it's something simple.</p>