Add class "active" in existing jQuery code
<p>I want to add class "active" in existing jQuery code I'm not quite good in jQuery I try but I'm not lucky enough. </p>

<p>i want to add class "active" for active state</p>

<p>I have a sample <a href="http://jsfiddle.net/jhunlio/CNgJM/2/" rel="nofollow">here</a></p>

<pre><code>$(function() {
    $('#arrow').click(function() {
        $('.toggleContent').slideToggle('fast');
        return false;
    });
});
</code></pre>
