jquery实现焦点轮播效果

HTML代码 &lt;!DOCTYPE html> &lt;html lang=en&gt; &lt;head&gt; &lt;meta charset=UTF-8&gt; &lt;title&gt;Title&lt;/title&gt; &lt;link rel=stylesheet href=./css/lunbo.css rel=external nofollow &gt; &lt;/head&gt; &lt;body&gt; <div id=banner> <ul class=img-ul></ul> <ol class=index-ol></ol> <div class=slide> <span class=prev>&lt;