<!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>
<style>
.affix { top: 20px;
}
</style>
</head>
<body>
<div class="container-fluid" style="background-color:#2196F3;color:#fff;height:200px;">
<h1>Bootstrap Affix实例</h1>
<h3>Fixed (sticky) vertical sidenav on scroll</h3>
<p>Scroll this page to see how the left navigation menu behaves with data-spy="affix".</p>
<p><strong>The left menu sticks to the page when you have scrolled a specified amount of pixels.</strong></p>
</div>
<br>
<div class="container">
<div class="row">
<nav class="col-sm-3">
<ul class="nav nav-pills nav-stacked">
<li class="active"><a href="#section1">Section 1</a></li>
<li><a href="#section2">Section 2</a></li>
<li><a href="#section3">Section 3</a></li>
</ul>
</nav>
<div class="col-sm-9">
<h1>Some text to enable scrolling</h1>
<h1>Some text to enable scrolling</h1>
<h1>Some text to enable scrolling</h1>
<h1>Some text to enable scrolling</h1>
<h1>Some text to enable scrolling</h1>
<h1>Some text to enable scrolling</h1>