title: jQuery selector with specific attribute
body: <p>I've got this code:</p>
  
  <pre><code>$('a').click(
     function() {
         $("#change_flash").css("display", "block"); $("#my_flash").css("display", "none");
    });
  </code></pre>
  
  <p>But this one works for all anchor elements. I would like to influence with this script only for anchors elements which contains rel="lightbox" attribute.  </p>
  
  <p>How can I achieve it?</p>