织梦模板产品页折叠菜单进入定位默认展开的方法

<script>   $(document).ready(function () {        openoff('#part2_{dede:field.id/}');        openoff('#part2_{dede:field.reid/}');    })   function openoff(obj){       $(obj).next("dd").css("display","block");       $(obj).addClass("launched");   }   </script> <div class="menu" id="sidebar" data-csnow="2" data-class3="0" data-jsok="2"> {dede:channelartlist typeid=27}  <dl class="list-none navnow">    <dt id='part2_{dede:field name="id"/}' ><a href='{dede:field name="typeurl"/}'  title='{dede:field name="typename"/}' ><span>{dede:field name="typename"/}</span></a></dt>    <dd class="sub" > {dede:channel type='son' noself='yes'}      <h4 id='part3_[field:id/]'><a href="[field:typedir function="str_replace('{cmspath}','',@me)"/]"  title='[field:typename /]' class='nav'><span>[field:typename /]</span></a></h4>      {/dede:channel}  </dd>  </dl>  {/dede:channelartlist}  <div class="clear"></div></div>  <Style type="text/css">    .launched{background-image:url(/skin/images/nav_hover.jpg);color: #d5b687;}    .list-none{ list-style:none; padding:0px; margin:0px;}    .menu dl{ margin-top:5px; }    .menu dt{cursor: pointer;margin-top: 10px;font-weight: bold;font-size: 16px;font-family: "微软雅黑";color: #0d2180;line-height: 53px;padding-left: 48px;background: url(/skin/images/nav.jpg) no-repeat;}    .menu h4 a{ display: block;width: 200px;height: 28px;font-family: "微软雅黑";text-align: center;font-size: 14px;line-height: 28px;color: #333; }    .menu h4 span{ display: block;width: 200px;height: 28px; font-weight:100;font-family: "微软雅黑";text-align: center;font-size: 14px;line-height: 28px;color: #333; }    .menu h4 a:hover{color: #fff;background-color: #d5b687;}</Style>