Add class to a div via Jquery
<p>I have the div which is generated when page loads as below.</p>

<pre><code>&lt;div class="redactor_ redactor_editor"&gt;&lt;/div&gt;
</code></pre>

<p>How can I add a class .example onto it via jquery like below?</p>

<pre><code>&lt;div class="redactor_ redactor_editor example"&gt;&lt;/div&gt;
</code></pre>

<p>Thank you very much!</p>
