BootStrap3.X--Carousel轮播不自动播放问题

先看一下Carousel的正确写法（代码，这里使用的是Bootstrap 3.2版本）：

<div id="carousel-ad" class="carousel slide" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#carousel-ad" data-slide-to="0" class="active"></li>
<li data-target="#carousel-ad" data-slide-to="1"></li>
<li data-target="#carousel-ad" data-slide-to="2"></li>
</ol>
<div class="carousel-inner" role="listbox">
<div class="item active"><img class="img-responsive" src="images/pic01.jpg"></div>
<div class="item"><img class="img-responsive" src="images/pic02.jpg"></div>
<div class="item"><img class="img-responsive" src="images/pic03.jpg"></div>
</div>
</div>