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根据老师的代码,自己敲得。代码的规范让我省了很多时间去反复查看

2018-11-21 15:27:03206

<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">
 <title>三级下拉菜单</title>
 <script type="text/javascript" src="jquery-3.3.1.min.js"></script>
 <style type="text/css">
 *{margin: 0px;padding: 0px;}
 .menu { width:600px;height: 35px;margin: 0px auto;background: #000; margin-top: 20px;color: #fff; border:1px solid #ccc;border-radius: 5px; }
    ul{ list-style: none;}
    ul li {width: 100px;height: 35px;line-height: 35px;text-align: center;float: left;border-right: 1px solid #ccc;cursor: pointer;margin: 0px auto; }

    .twobox li {width: 100px;height: 30px;line-height: 30px;background: #2D2D2D;color: #A9A9A9; font-size: 14px;position: relative;border:0px;}
    .twobox li:hover {background: #000;color: #fff;}
    .three {position: absolute; top: 0px;left: 100px;}
    .three li {width: 99px;height: 30px;line-height: 30px;border: 0px;}
 </style>
 <script type="text/javascript">
  $(function(){
    //隐藏二级与三级下拉菜单
     $('.twobox').hide()
     $('.three').hide()

    //当鼠标移动到包含二级菜单的一级菜单时显示当前二级菜单
           $('.one li').mouseover(function(){
            $(this).find('.twobox').slideDown(500)
           })

    //当鼠标移出包含二级菜单的一级菜单时隐藏当前二级菜单
           $('.one li').mouseleave(function(){
            $(this).find('.twobox').slideUp(500)
            })

    //当鼠标移动到包含三级菜单的二级菜单时显示当前三级菜单
            $('.two').mouseover(function(){
            $(this).find('.three').slideDown(500)
           })

    //当鼠标移出包含三级菜单的二级菜单时隐藏当前三级菜单
    $('.two').mouseleave(function(){
            $(this).find('.three').slideUp(500)
            })
   
  })
  
 </script>
</head>
<body>
  <div class="menu">
            <ul class="one"><!-- 一级下拉菜单 one -->
                <li>首 页
                </li>
                <li>商品分类
                    <ul class="twobox"><!-- 二级下拉菜单 twobox-->
                        <li class="two">男人
                         <ul class="three"><!--三级下拉菜单 three-->
                                <li>外套</li>
                                <li>情侣装</li>
                                <li>夹克</li>
                                <li>毛衣</li>
                            </ul>  

                        </li>
                        <li class="two">箱包
                            <ul class="three"><!--三级下拉菜单 three-->
                                <li>产品1.1</li>
                                <li>产品1.2</li>
                                <li>产品1.3</li>
                                <li>产品1.4</li>
                            </ul>  
                        </li>
                        <li class="two">数码
                           <ul class="three">
                                <li>电脑</li>
                                <li>手机</li>
                                <li>相机</li>
                                <li>手表</li>
                            </ul> 
                        </li>
                        <li>女人</li>
                    </ul>
                </li>
                <li>我的淘宝
                    <ul class="twobox">
                        <li>以买到的宝贝</li>
                        <li class="two">我的足迹
                            
                        </li>
                        <li>我的上新</li>
                        <li>淘宝达人</li>
                    </ul>
                </li>
                <li>购物车</li>
                <li>收藏夹</li>
            </ul>
        </div>  
</body>
</html>


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