jquery with radio button
<p>whats wrong with this code? Why don't show value?</p>

<p>Thanks</p>

<pre><code>&lt;script&gt;
    $(document).ready(function()
    {
        $('#radio_div').change(function(event){
            var value = $("input[@name='rdio']:checked").val();
            $('#update_text').html('Radio value:' + value);
        });
    });
    &lt;/script&gt;
    &lt;/head&gt;                                                                 
    &lt;body&gt;  

    &lt;div id="radio_div"&gt;
        &lt;input type="radio" name="rdio" value="a" /&gt;
        &lt;input type="radio" name="rdio" value="b" /&gt;
        &lt;input type="radio" name="rdio" value="c" /&gt;
    &lt;/div&gt;
    &lt;div id="update_text"&gt;Please push radio button&lt;/div&gt;
</code></pre>
