[jQuery] Why doesn't my prev() work?

[Keir]

Hi,

I'm sure to a whizz this is going to be a bit of a noob question, but
why doesn't my prev() work here:

<script type="text/javascript">
            $(document).ready(function() {
            $('.child').hide();
            $('name=selected').prev('.child').show();
            });
</script>


HTML:

<ul class="parent">
<li><a href="">test 1</a></li>
<li><a href="">test 1</a>
<ul class="child">
<li><a href="" name="selected">test 1</a></li>
<li><a href="">test 1</a></li>
</ul>
</li>
<li><a href="">test 1</a>
<ul class="child">
<li><a href="">test 1</a></li>
<li><a href="">test 1</a></li>
</ul>
</li>
</ul>

Cheers chaps,

Keir