How to change css attribute of a class
<p>I have <code>&lt;span&gt;</code> inside a <code>&lt;div&gt;</code>, like so:</p>

<pre><code>&lt;div id="#mydiv"&gt;
&lt;a href="#"&gt;Hello&lt;/a&gt;&lt;span class="myImageArea"&gt;&lt;/span&gt;
    &lt;div class="someClass"&gt;
    &lt;/div&gt;
&lt;/div&gt;                          
</code></pre>

<p>With the following CSS:</p>

<pre><code>.myImageArea {  
    background: url("../img/upArrow.png") no-repeat right 5px;
    display: inline-block;
    cursor: pointer;
}
</code></pre>

<p>I want to change the attribute <code>background:url</code> of class <code>myImageArea</code></p>

<pre><code>$('#mydiv').click(function() {
    //change the background image of the class
});
</code></pre>

<p>How can this be done?</p>
