用unslider实现轮播图，图像上没有圆点怎么回事？

Question

<style>         .banner { position: relative;overflow:auto}        .banner li { list-style: none; }                 .banner ul li { float: left; }</style>------------------------------- <div class="CrisprBanner banner">                <ul >                     <li>                         <img src="banner0.png">                                      </li>                     <li>                         <img src="banner.png">                          </li>                      </ul>             </div>-------------------