what's the best way to add a class to the div with a class of post every 4 seconds using jquery?
<p>what's the best way to add a class to the div with a class of post every 4 seconds using jquery?</p>

<pre><code>&lt;div class="34 post"&gt;
&lt;img width="311" height="417" src="#" class="#" alt="newspapers" /&gt;
&lt;h2&gt;&lt;a href="#"&gt;Headline News Part 2&lt;/a&gt;&lt;/h2&gt;
&lt;p&gt;testing new content&lt;/p&gt;
&lt;/div&gt;

&lt;div class="9 post"&gt;
&lt;img width="311" height="417" src="#" class="#" alt="newspapers" /&gt;
&lt;h2&gt;&lt;a href="#"&gt;Headline News Part 2&lt;/a&gt;&lt;/h2&gt;
&lt;p&gt;testing new content&lt;/p&gt;
&lt;/div&gt;

&lt;div class="6 post"&gt;
&lt;img width="311" height="417" src="#" class="#" alt="newspapers" /&gt;
&lt;h2&gt;&lt;a href="#"&gt;Headline News Part 2&lt;/a&gt;&lt;/h2&gt;
&lt;p&gt;testing new content&lt;/p&gt;
&lt;/div&gt;
</code></pre>

<p>so i want the first  to have a class of "display" then after 4 seconds, i want to remove the class on that one and add it to the second one. and then after 4 more seconds, remove it from the second and add it to the third. when it gets to the end it loops back around.</p>
