<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Bootstrap历练实例：导航内下拉菜单的用法</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<link rel="stylesheet" href="bootstrap-3.3.5-dist/css/bootstrap.min.css" />
</head>
<body>
<div class="container">
<nav role="navigation" class="navbar navbar-default">
<div class="navbar-header">
<a class="navbar-brand" href="#">w3cSchool</a>
</div>
<div>
<ul class="nav navbar-nav">
<li class="active"><a href="#">Html5</a></li>
<li><a href="#">Css3</a></li>
<li class="dropdown">
<a ></script>
</body>
</html>
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