How to use HTML to create a secondary menu bar that the mouse moves over (example source code)-HTML Tutorial-php.cn

How to use HTML to create a secondary menu bar that the mouse moves over (example source code)

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Release： 2018-10-09 16:10:59

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This article mainly introduces how to use HTML to create a secondary menu bar (example source code) that the mouse moves over. It is very helpful for building a website. Friends who need it can refer to it and share the example source code with everyone. As follows:

First, the renderings:

1. The mouse is not on it

2. The mouse is placed on the first-level menu. Expand the secondary menu

3. Place the mouse on the secondary menu

The example source code is as follows:

<html>
<head>
    <title>二级菜单测试</title>
    <meta charset="utf-8">
    <style type="text/css">

    /*为了使菜单居中*/
    body {
        padding-top:100px;
        text-align:center; 
    }
    
    
    /* -------------菜单css代码----------begin---------- */
    .menup { 
        border: 2px solid #aac; 
        overflow: hidden; 
        display:inline-block;
    }
    
    /* 去掉a标签的下划线 */
    .menup a {
        text-decoration: none;
    }
    
    /* 设置ul和li的样式 */
    .menup ul , .menup li {
        list-style: none;
        margin: 0;
        padding: 0;
        float: left;
    } 
    
    /* 设置二级菜单绝对定位，并隐藏 */
    .menup > ul > li > ul {
        position: absolute;
        display: none;
    }

    /* 设置二级菜单的li的样式 */
    .menup > ul > li > ul > li {
        float: none;
    }
  
    /* 鼠标放在一级菜单上，显示二级菜单 */
    .menup > ul > li:hover ul {
        display: block;
    }

    /* 一级菜单 */
    .menup > ul > li > a {
        width: 120px;
        line-height: 40px;
        color: black;
        background-color: #cfe;
        text-align: center;
        border-left: 1px solid #bbf;
        display: block;
    }
    
    /* 在一级菜单中，第一个不设置左边框 */
    .menup > ul > li:first-child > a {
        border-left: none;
    }

    /* 在一级菜单中，鼠标放上去的样式 */
    .menup > ul > li > a:hover {
        color: #f0f;
        background-color: #bcf;
    }

    /* 二级菜单 */
    .menup > ul > li > ul > li > a {
        width: 120px;
        line-height: 36px;
        color: #456;
        background-color: #eff;
        text-align: center;
        border: 1px solid #ccc;
        border-top: none;
        display: block;
    }
    
    /* 在二级菜单中，第一个设置顶边框 */
    .menup > ul > li > ul > li:first-child > a {
        border-top: 1px solid #ccc;
    }
    
    /* 在二级菜单中，鼠标放上去的样式 */
    .menup > ul > li > ul > li > a:hover {
        color: #a4f;
        background-color: #cdf;
    }
    /* -------------菜单css代码----------end---------- */
    
    </style>
</head>
<body>

    <!-- -------菜单html代码---------begin------- -->
    <p class="menup">
        <ul>
            <li>
                <a href="#">菜单一</a>
                <ul>
                    <li><a href="#">二级菜单</a></li>
                    <li><a href="#">二级菜单</a></li>
                    <li><a href="#">二级菜单</a></li>
                </ul>
            </li> 
            <li>
                <a href="#">菜单二</a>
                <ul>
                    <li><a href="#">二级菜单</a></li>
                    <li><a href="#">二级菜单</a></li>
                </ul>
            </li> 
            <li>
                <a href="#">菜单三</a>
                <ul>
                    <li><a href="#">二级菜单</a></li>
                    <li><a href="#">二级菜单</a></li>
                    <li><a href="#">二级菜单</a></li>
                    <li><a href="#">二级菜单</a></li>
                    <li><a href="#">二级菜单</a></li>
                </ul>
            </li> 
            <li>
                <a href="#">菜单四</a>
            </li> 
            <li>
                <a href="#">菜单五</a>
                <ul>
                    <li><a href="#">二级菜单</a></li>
                    <li><a href="#">二级菜单</a></li>
                    <li><a href="#">二级菜单</a></li>
                </ul>
            </li> 
        </ul>
    </p>
    <!-- -------菜单html代码---------end------- -->
    
</body>
</html>

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