导航条基础
实例：
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>导航条</title>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
</head>
<body>
<!--基本导航条-->
<div class="navbar navbar-default" role="navigation">
<ul class="nav navbar-nav">
<li class="active"><a href="##">网站首页</a></li>
<li><a href="##">系列教程</a></li>
<li><a href="##">名师介绍</a></li>
<li><a href="##">成功案例</a></li>
<li><a href="##">关于我们</a></li>
</ul>
</div>
<div class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<a href="##" class="navbar-brand">慕课网</a>
</div>
<ul class="nav navbar-nav">
<li class="active"><a href="##">网站首页</a></li>
<li class="dropdown">
<a href="##" data-toggle="dropdown" class="dropdown-toggle">系列教程<span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="##">CSS3</a></li>
<li><a href="##">JavaScript</a></li>
<li class="disabled"><a href="##">PHP</a></li>
</ul>
</li>
<li><a href="##">名师介绍</a></li>
<li><a href="##">成功案例</a></li>
<li><a href="##">关于我们</a></li>
</ul>
<form action="##" class="navbar-form navbar-left" rol="search">
<div class="form-group">
<input type="text" class="form-control" placeholder="请输入关键词" />
</div>
<button type="submit" class="btn btn-default">搜索</button>
</form>
</div>
<!--代码-->
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
</body>
</html>
