Keeping Pop-ups in viewport
<p>I am using a <a href="http://users.tpg.com.au/j_birch/plugins/superfish/#getting-started" rel="nofollow">Superfish</a> plugin to display menu pop-ups but the problem is when a menu item is big it gets overflow from viewport.</p>

<p>How can I adjust the position of pop-up menu to always keep it in the viewport.<br>
<img src="http://i54.tinypic.com/1676pp1.png" alt="alt text"></p>
