<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>实战</title>
<link rel="stylesheet" href="css/bootstrap.min.css" />
<style>
.jumbotron {
padding :50px 180px;
}
</style>
</head>
<body>
<nav class="navbar navbar-default .navbar-fixed-top ">
<div class="container">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<a class="navbar-brand" href="#">Project name</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home <span class="sr-only">(current)</span></a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">Separated link</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li><a href="#">Default</a></li>
<li><a href="#">Static top</a></li>
<li><a href="#">Fixed top</a></li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
<div class="jumbotron">
<h1>Navbar example</h1>
<p class="lead">This example is a quick exercise to illustrate how the default, static and fixed to top navbar work. It includes the responsive CSS and HTML, so it also adapts to your viewport and device.
To see the difference between static and fixed top navbars, just scroll.</p>
<p><a class="btn btn-lg btn-primary" href="#" role="button">View navbar docs »</a></p>
</div>
<script type="text/javascript" src="js/jquery-3.0.0.min.js" ></script>
<script type="text/javascript" src="js/bootstrap.min.js" ></script>
</body>
</html>
效果：
