Get class input with closest
<p>I want to get class <code>.mGMZs</code> in input <code>name=age</code> with <code>.closest</code>, I try it in following demo but i doesn't work as expected, how can I fix it?</p>

<pre><code>&lt;div class="age"&gt;
    &lt;div class="column"&gt;
        &lt;input name="age[0][]" class="mGMZs" placeholder="Age(Geting class this)"&gt;
        &lt;div class="p_age"&gt;
        &lt;/div&gt;
    &lt;/div&gt;
    &lt;br /&gt;
    &lt;button&gt;Click Me&lt;/button&gt;
&lt;/div&gt;


$('button').live('click', function () {
    var class_age = '.' + $(this).closest('div.age').find('input[name="age"]').prop('name');
    alert(class_age);
})
</code></pre>
