日期:2014-05-17  浏览次数:20849 次

css实现多级菜单

实现原理 用ul和li 来展示多级菜单,当ul上有鼠标时,就展开该ul下的所有li标签, 当ul(包括其下面的li)没有鼠标时候,该ul就被隐藏

当然 多级菜单也可以用js来实现~~~

代码如下:存为 menu.html 即可查看效果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>css实现的menu</title>
<style type="text/css">

.menu {
?? z-index:3;
?? font-size: 12px;
}

.menu ul {
?? padding: 0;
?? margin: 0;
?? list-style-type: none;
?? width: 100px;
?? position: relative;
}

.menu li {
?? background: #AFDD22;
?? height: 26px;
?? position: relative;
}

.menu li {
?? float: left;
?? margin-left: -16px;
?? margin-left: 0;
?? position: relative;
}

?

.menu a, .menu a:visited {
?? display: block;
?? text-decoration: none;
?? height: 25px;
?? line-height: 25px;
?? width: 100px;
?? text-indent: 5px;
?? border-bottom: 1px solid #fff;

}

.menu a:hover {
?? color: #fff;
?? background: #40DE5A;
}


.menu ul ul {
?? visibility: hidden;
?? position: absolute;
?? top: -1px;
?? left: 100px;
}

.menu ul li:hover ul, .menu ul a:hover ul {
?? visibility: visible;
}

.menu ul :hover ul ul {
?? visibility: hidden;
}

.menu ul :hover ul :hover ul {
?? visibility: visible;
}


</style>
</head>
<body>
<div class="menu">
?? <ul><!--ul是目录 li是具体数据,每个ul里面有li ,然后li 里面有ul和li 最终数据是在li里面 -->
???? <li><a href="#">菜单一? </a>
?????? <ul>
???????? <li><a href="#">菜单一1? </a>
?????????? <ul>
???????????? <li><a href="#">菜单一1-1</a> </li>
???????????? <li><a href="#">菜单一1-2 </a> </li>
?????????? </ul>
???????? </li>
???????? <li><a href="#">菜单一2</a></li>
???????? <li><a href="#">菜单一3  ?</a>
?????????? <ul>
???????????? <li><a href="#">菜单一3-1</a> </li>
???????????? <li><a href="#">菜单一3-2</a> </li>
?????????? </ul>
???????? </li>
?????? </ul>
???? </li>
???? <li><a href="#">菜单二</a></li>
?? </ul>
</div>
</body>
</html>

结果如下: