title: Data-* attr not working with jQuery
body: <p>I cannot seem to get this data- attribute to work.  It keeps saying undefined.</p>
  
  <p>JavaScript:</p>
  
  <pre><code>$(".navlink").click(function() {
      alert($(this).data('link'));
  })
  </code></pre>
  
  <p>HTML:</p>
  
  <pre><code>&lt;div class="navlink" data-link="portfolio"&gt;
       &lt;span class="bottom"&gt;Portfolio&lt;/span&gt;
  &lt;/div&gt;
  </code></pre>