title: Add some properties to a <div> element
body: <p>I want to add some properties to a <code>&lt;div&gt;</code> element.  All of the below works except for the <code>.data()</code>.  I cannot see it appear in Firefox/Firebug.</p>
  
  <pre><code>$('#menu-container')
    .css('background-image','url("'+big_image+'")')
    .addClass('click_2')                          
    .data("new_link", "new_link.html")
    .css('z-index',"99");
  </code></pre>
  
  <p>Am I doing it wrong?</p>