织梦产品页折叠菜单，进入定位默认展开
织梦做产品栏目的时候，会有一级栏目和二级栏目，一般都喜欢用折叠的效果！！但是点击进入的话，默认会关闭！怎么才能让它默认打开呢！做啦提供了这方面的标签和js！ 注意！这个只是一个实例，没有折叠效果的js效果！js自行网上查找！！
<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" style="display:none;"> {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>
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