How make the image keep moving all the time
<p>I have an image called 'rocket'. I want this image moving and moving, moving to top and bottom, top and bottom in the page without stopping using jQuery.</p>

<pre><code>&lt;img src="http://www.iconfinder.com/icondetails/15535/128/launch_rocket_icon" /&gt;
</code></pre>

<p>Like this site <a href="http://aelissa.net/rocket/" rel="nofollow">here</a>.</p>
