<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>等分按钮</title>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="style.css">
</head>
<body>
<ul class="nav nav-pills">
<li class="active"><a href="##">首页</a></li>
<li class="dropdown">
<a href="##" class="dropdown-toggle" data-toggle="dropdown">教程<span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="##">CSS3</a></li>
<li><a href="##">Sass</a></li>
<li><a href="##">jQuery</a></li>
<li><a href="##">Responsive</a></li>
</ul>
</li>
<li><a href="##">关于我们</a></li>
</ul>
<br />
<ul class="nav nav-tabs">
<li class="active"><a href="##">首页</a></li>
<li class="dropdown">
<a href="##" class="dropdown-toggle" data-toggle="dropdown">教程<span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="##">CSS3</a></li>
<li><a href="##">Sass</a></li>
<li class="nav-divider"></li>
<li><a href="##">jQuery</a></li>
<li><a href="##">Responsive</a></li>
</ul>
</li>
<li><a href="##">关于我们</a></li>
</ul>
<script src="https://www.imooc.com/static/lib/jquery/1.9.1/jquery.js"></script>
<script src="http://img.mukewang.com/down/53c6484f00013d9300000000.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
</body>
</html>
为什么二级菜单出不来？？是缺了什么吗?
在head或body尾部添加下面代码
<script src="https://www.imooc.com/static/lib/jquery/1.9.1/jquery.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
出来了 不好意思 请忽略我