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bootstrap：导航下拉菜单
提示：扫一扫查出行【扫一扫了解最新限行尾号】
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1, user-scalable=no">
<title>导航加入下拉菜单</title>
<link rel="stylesheet" href="css/bootstrap.css">
<script src="js/jquery.js"></script>
<script src="js/bootstrap.min.js"></script>
</head>
<body>
<ul class="nav nav-tabs">
<li><a href="#">首页</a></li>
<li><a href="#">首页</a></li>
<li><a href="#">首页</a></li>
<li><a href="#">首页</a></li>
<li><a href="#">首页</a></li> <li class="dropdown">
<a href="#" data-toggle="dropdown">更多 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">超清</a></li>
<li><a href="#">超清</a></li>
<li><a href="#">超清</a></li>
</ul>
</li>
</ul>
<body>
</html>
示例图：
