Jquery选择

<div class="item"  id="demoUser" style="display: none">
<div class="list1">
<div class="list_pic">
<img src="images/tx_2.png" width="50" height="50" alt="计算机专业" />
</div>
<img src="images/male_icon.png" width="15" height="15" class="man" /><!--男-->
</div>

<div class="list2">
<dl>
<dt>大大大神</dt>
<dt>AAAAAA</dt>
<dd>计算机专业 维修小能手</dd>
</dl>
</div>
<div class="list3">
<a href="#">选 他</a>
</div>
</div>