Bootstrap是Twitter退出的一个开源的用于前端开发的工具包。它由Twitter的设计师Mark Otto和Jacob Thornton合作开发，是一个CSS/HTML框架。Bootstrap提供了优雅的HTML和CSS规范，它即是由动态Css语言和Less写成。Bootstrap一经推出后颇受欢迎，一直是GitHub上的热门开源项目，包括NASA的MSNBC（微软全国广播公司）的Breaking News都使用了该项目。
–摘自–百度百科
准备工作：
1、去官网下载bootstrap文件 http://v3.bootcss.com/getting-started/
2、网站引用bootstrap文件
注意：bootstrap脚本是建立在jquery基础上的，在引用bootstrap.min.js前需引用jquery,jquery版本支持1.9.1以上版本。
一：导航栏
<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container">
<ul class="nav nav-pills" >
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >首页 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Home</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Profile</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Messages</a></li>
</ul>
</li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Home</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Home</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Home</a></li>
</ul>
</div>
</nav>
运行后效果为：
二：Carousel 轮播
<div id="myCarousel" class="carousel slide" data-ride="carousel">
<!--轮播指标-->
<ol class="carousel-indicators">
<li data-target="#myCarousel" data-slide-to="0" class="active"></li>
<li data-target="#myCarousel" data-slide-to="1"></li>
<li data-target="#myCarousel" data-slide-to="2"></li>
</ol>
<!--轮播项目-->
<div class="carousel-inner" role="listbox">
<div class="item active">
<img src="../Img/xx.png" />
<div class="container">
<div class="carousel-caption">标题1</div>
</div>
</div>
<div class="item">
<img src="../Img/xx.png" />
<div class="container">
<div class="carousel-caption">标题2</div>
</div>
</div>
<div class="item">
<img src="../Img/xx.png" />
<div class="container">
<div class="carousel-caption">标题3</div>
</div>
</div>
</div>
<!--轮播导航-->
<a class="carousel-control left" href="#myCarousel" rel="external nofollow" rel="external nofollow" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control right" href="#myCarousel" rel="external nofollow" rel="external nofollow" data-slide="next">
<span class="glyphicon glyphicon-chevron-right"></span>
<span class="sr-only">Next</span>
</a>
</div>
运行效果如图：
用法：
通过 data属性：使用data属性可以控制轮播的位置。
属性data-slide接受关键字prev或next，用来改变幻灯片相对于当前位置的位置。
使用data-ride=”carousel”属性用于标记轮播在页面加载时就开始播放动画。
通过javascript：可以通过 $(‘.carousel’).carousel()手动调用。
具体使用方法可以去bootstrap官网了解http://www.bootcss.com/
