What is self.moveBy and why doesn't it work on Chrome?
<p>I found the <code>self.moveBy</code> function <a href="http://www.java-scripts.net/javascripts/Earthquake.phtml" rel="nofollow">here</a>.</p>

<p>Somehow the code doesn't seem to work on Chrome, although <code>self.moveBy</code> does exist on Chrome!</p>

<p>What exactly is <code>self.moveBy</code>, and why doesn't it work on Chrome?</p>
