How is privacy achieved here?
<p>Could someone tell me how the public and private methods are achiveved in this example code for a simple animation library from dustin Diaz. How are the private methods distinguished from the public one? </p>

<p><a href="http://www.dustindiaz.com/javascript-animate/" rel="nofollow">http://www.dustindiaz.com/javascript-animate/</a></p>
