title: Div slides in after scrolling down
body: <p>Here is my code
  <a href="http://jsfiddle.net/mihaene/7bdkB/" rel="nofollow">http://jsfiddle.net/mihaene/7bdkB/</a></p>
  
  <p>I want a div to slide in, as soon as I scroll down a certain amount of pixel.
  It works, but very, very delayed (like 5seconds).
  What's the problem?</p>
  
  <p>Any suggestion would be very much appreciated.</p>