jqm 二级子菜单无法的问题

[lovetaosha]

       <div data-role="footer" data-position="fixed" data-tap-toggle="false" data-theme="a" id="foot">
            <a href="#menu" data-rel="popup" class="ui-btn-corner-all">其它拼车群</a>
            <div data-role="popup" id="menu">
                <ul data-role="listview" data-inset="true" data-mini="true">
                    <li>
                        <a href="#LinGang" data-rel="popup">临港</a>
                        <div data-role="popup" id="LinGang">
                            <ul data-role="listview">
                                <li><a href="#">泥城拼车群2</a></li>
                                <li><a href="#">泥城拼车群2</a></li>
                            </ul>
                        </div>
                    </li>
                    <li data-icon="false"><a href="#">南汇</a></li>
                    <li data-icon="false"><a href="#">奉贤</a></li>
                    <li data-icon="false"><a href="#">泥城拼车群2</a></li>
                </ul>
            </div>
            <a href="#" id="btnLastPage" class="ui-btn-corner-all">上一页</a>
            <a href="#" id="btnNextPage" class="ui-btn-corner-all">下一页</a>
        </div>

以上的，点"临港"点不出来子菜单，真上火啊

[lovetaosha]

upuppuppupup