How to detect when certain div is out of view
<p>I just saw something very interesting in vk.com</p>

<p>Basically in profile page the right column is changing its width when the left column is gone of the view.</p>

<p>Example : <a href="http://vk.com/durov" rel="nofollow">http://vk.com/durov</a></p>

<p>Just scroll down a little bit to see it.</p>
