<div class="menu">
    <div class="btn"></div>
</div>
<ui class="nav">
    <li><a href="/">优诚首页</a></li>
    <li><a href="http://www.ycfawu.com/yonggong/">用工风险分析</a></li>
    <li><a href="http://www.ycfawu.com/dingzhi/">合同订制</a></li>
    <li><a href="http://www.ycfawu.com/service/">服务流程</a></li>
    <li><a href="http://www.ycfawu.com/service-case/">服务案例</a></li>
    <li><a href="http://www.ycfawu.com/about/">关于我们</a></li>
</ui>
    <script>
        $(document).ready(function() {
            $('.menu').click(function() {
                $(this).parent('.wap').toggleClass('open');
            });
        });
    </script>