How to fade out text when it is about to move out of visual range?
<p>How to fade in and out text when it is about to move out of visual range? Maybe the question is a little bit vague, but what I mean is this:</p>

<p><img src="http://i.stack.imgur.com/0lQRR.png" alt="fade in or out when text is to be out of visual range"></p>

<p>How do I achieve that? Perhaps with jQuery or something?</p>
