jquery怎么得到a标签
使用jquery怎么在我点击 监控系统 显示或者隐藏（视频监控，传感器，车辆监控）
<dl class="menu">
<dt>
<a href='javascript:void(0)' name='left_title'class='titl'>监控系统</a>
</dt>
<dd><a href='VideoAll' target='manFrame' >视频监控</a></dd>
<dd><a href='SenorAll' target='manFrame'>传感器</a></dd>
<dd><a href='VehicleMsAll' target='manFrame' >车辆监控</a></dd>
</dl>
[解决办法]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js"></script><script type="text/javascript">$(document).ready( function() { $("a.titl").toggle( function () { $(this).parent().siblings('dd').hide(); }, function () { $(this).parent().siblings('dd').show(); } );});</script></head><body><dl class="menu"> <dt><a href='javascript:void(0)' name='left_title'class='titl'>监控系统</a> </dt> <dd><a href='VideoAll' target='manFrame' class='blue'>视频监控</a></dd> <dd><a href='SenorAll' target='manFrame' class='blue'>传感器</a></dd> <dd><a href='VehicleMsAll' target='manFrame' class='blue'>车辆监控</a></dd></dl><dl class="menu"> <dt><a href='javascript:void(0)' name='left_title'class='titl'>电池组管理</a> </dt> <dd><a href='BatteryOntAll' target='manFrame' >电池组批号管理</a></dd> <dd><a href='Battery_add.jsp' target='manFrame' >添加电池组批号</a></dd> <dd><a href='Battery_addTitle.jsp' target='manFrame' class='red'>录入电池组</a></dd> <dd><a href='BatteryMsAll.action?pageNow=1' target='manFrame'>电池组管</a></dd></dl></body></html>