<!DOCTYPE html>
<html>
<head>
<title>Bootstrap实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css">
<script src="https://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script>
<script src="https://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
</head>
<body style="height:1500px">
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="#">WebSiteName</a>
</div>
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#">Page 1</a></li>
<li><a href="#">Page 2</a></li>
<li><a href="#">Page 3</a></li>
</ul>
</div>
</nav>
<div class="container" style="margin-top:50px">
<h3>Fixed Navbar</h3>
<div class="row">
<div class="col-md-4">
<p>A fixed navigation bar stays visible in a fixed position (top or bottom) independent of the page scroll.</p>
<p>A fixed navigation bar stays visible in a fixed position (top or bottom) independent of the page scroll.</p>
</div>
<div class="col-md-4">
<p>A fixed navigation bar stays visible in a fixed position (top or bottom) independent of the page scroll.</p>
<p>A fixed navigation bar stays visible in a fixed position (top or bottom) independent of the page scroll.</p>
</div>
<div class="col-md-4">
<p>A fixed navigation bar stays visible in a fixed position (top or bottom) independent of the page scroll.</p>
<p>A fixed navigation bar stays visible in a fixed position (top or bottom) independent of the page scroll.</p>
</div>
</div>
</div>
<h1>Scroll this page to see the effect</h1>
</body>
</html>