代码如下:<!DOCTYPE HTML><html lang=”en-US”><head> <meta charset=”UTF-8″> <title>无缝滚动——上下</title> <style type=”text/css”> *{margin:0;padding:0;} li{list-style:none;} img{border:0;} #scroll{width:178px;margin:50px auto;position:relative;} .btn{display:block;width:27px;height:27px;p
