<div class="carousel slide" data-ride="carousel" id="carousel" data-interval="3000"> //data-interval设置轮播间隔为3秒钟
 <!-- 广告序号指示器(表示当前第几张的下方的几个小圆圈)，可加可不加 -->
 <ol class="carousel-indicators">
  <li data-target="#carousel" data-slide-to="0"></li>
  <li data-target="#carousel" data-slide-to="1" class="active"></li>
  <li data-target="#carousel" data-slide-to="2"></li>
  <li data-target="#carousel" data-slide-to="3"></li>
 </ol>
 <div class="carousel-inner">
  <div class="item">
   <img src="img/02.jpg" alt=""/>
   <!-- 为广告添加说明文字，在图片上中下方显示，可加可不加 -->
   <div class="carousel-caption">
    <h3>First slide label</h3>
    <p>Nulla vitae elit libero, a pharetra augue mollis interdum.</p>
   </div>
  </div>
  <div class="item active">
   <img src="img/03.jpg" alt=""/>
   <!-- 为广告添加说明文字，在图片上中下方显示，可加可不加 -->
   <div class="carousel-caption">
    <h3>Second slide label</h3>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
   </div>
  </div>
  <div class="item">
   <img src="img/04.jpg" alt=""/>
   <!-- 为广告添加说明文字，在图片上中下方显示，可加可不加 -->
   <div class="carousel-caption">
    <h3>Third slide label</h3>
    <p>Praesent commodo cursus magna, vel scelerisque nisl consectetur.</p>
   </div>
  </div>
  <div class="item">
   <img src="img/05.jpg" alt=""/>
   <!-- 为广告添加说明文字，在图片上中下方显示，可加可不加 -->
   <div class="carousel-caption">
    <h3>Fourth slide label</h3>
    <p>Nulla vitae elit libero, a pharetra augue mollis interdum.</p>
   </div>
  </div>
 </div>
 <!-- 上一张的按钮，可加可不加 -->
 <a class="left carousel-control" href="#carousel" rel="external nofollow" rel="external nofollow" data-slide="prev">
  <span class="glyphicon glyphicon-chevron-left"></span>
 </a>
 <!-- 下一张的按钮，可加可不加 -->
 <a class="right carousel-control" href="#carousel" rel="external nofollow" rel="external nofollow" data-slide="next">
  <span class="glyphicon glyphicon-chevron-right"></span>
 </a>
</div>