title: Increment css top property using jquery
body: <p>I have the following div :</p>
  
  <pre><code>&lt;div id="new" style="position: absolute; z-index: 100; top: 210px; width: 195px..
  </code></pre>
  
  <p>What is the best way to increase the <code>top</code> property when an event occurs?</p>
  
  <p>Note that I've tried: <code>$('#new').css('top')+10</code> but the problem is that <code>.css</code> returns string.</p>