Adding scroll wheel movement to a webpage
<p>in the below presentation i can scroll through the slides with the scroll wheel.</p>

<p><a href="http://dimroc.github.com/reveal.js-threejs/#/" rel="nofollow">http://dimroc.github.com/reveal.js-threejs/#/</a></p>

<p>this is the source code demonstration for the presentation below. the scroll wheel is not functional to go through the slides. my question is how do i make the scroll wheel functioning as an arrow key in my presentations? </p>

<p><a href="http://lab.hakim.se/reveal-js/#/" rel="nofollow">http://lab.hakim.se/reveal-js/#/</a></p>
