title: how to target specific css element in javascript?
body: <p>I've got my code:</p>
  
  <pre><code>$(document).ready(function() {
   $('#topznav ul li').click(function() {               
    $('#topznav').animate({
       marginLeft: '10px'        
     }, 400);
  });                                          
  });
  </code></pre>
  
  <p>I've got a question about the second line. It won't work. I mean, nothing really animates. The script file is loaded correctly because other functions work. What am I doing wrong here?</p>