js实现仿京东图片轮播效果，当鼠标划在窗口上面停止计时器，鼠标离开窗口，开启计时器，鼠标划在页签上面，停止计时器，手动切换，通过定义计时器封装函数run，封装函数changeOption，实现此效果，代码简单易懂，需要的小伙伴直接复制拷贝转走吧。
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Document</title> <style type="text/css"> *{margin:0;padding:0;list-style:none;} a{text-decoration: none;color: #fff;} #flash{width: 730px;height: 454px;margin: 100px auto;position: relative;cursor: pointer;} #pic li{position: absolute;top: 0;left: 0;z-index: 1;display: none;} #num{position: absolute;left: 40%;bottom: 10px;z-index: 2;cursor:default;} #num li{float: left;width: 20px;height: 20px;border-radius: 50%;background: #666;margin: 3px;line-height: 20px;text-align: center;color: #fff;cursor: pointer;} #num li.active{background: #f00;} .arrow{height: 60px;width: 30px;line-height: 60px;text-align: center;display: block;position: absolute;top:45%;z-index: 3;display: none;} .arrow:hover{background: rgba(0,0,0,0.7);} #flash:hover .arrow{display: block;} #left{left: 2%;} #right{right: 2%;} </style> <script type="text/javascript"> function $(id) { return typeof id==='string'?document.getElementById(id):id; } window.onload=function(){ var index=0; var timer=null; var pic=$("pic").getElementsByTagName("li"); var num=$("num").getElementsByTagName("li"); var flash=$("flash"); var left=$("left"); var right=$("right"); //单击左箭头 left.onclick=function(){ index--; if (index<0) {index=num.length-1}; changeOption(index); } //单击右箭头 right.onclick=function(){ index++; if (index>=num.length) {index=0}; changeOption(index); } //鼠标划在窗口上面，停止计时器 flash.onmouseover=function(){ clearInterval(timer); } //鼠标离开窗口，开启计时器 flash.onmouseout=function(){ timer=setInterval(run,2000) } //鼠标划在页签上面，停止计时器，手动切换 for(var i=0;i<num.length;i++){ num[i].id=i; num[i].onmouseover=function(){ clearInterval(timer); changeOption(this.id); } } //定义计时器 timer=setInterval(run,2000) //封装函数run function run(){ index++; if (index>=num.length) {index=0}; changeOption(index); } //封装函数changeOption function changeOption(curindex){ console.log(index) for(var j=0;j<num.length;j++){ pic[j].style.display="none"; num[j].className=""; } pic[curindex].style.display="block"; num[curindex].className="active"; index=curindex; } } </script></head><body> <div id="flash"> <ul id="pic"> <li style="display:block"><img src="http://img13.360buyimg.com/da/jfs/t2242/262/578407619/87636/4ffe0c5/56187ed2Nfed9a5b3.jpg" alt=""></li> <li><img src="http://img13.360buyimg.com/da/jfs/t2143/111/577347825/96150/e27180bd/561889b3N42ee62b5.jpg" alt=""></li> <li><img src="http://img20.360buyimg.com/da/jfs/t1825/234/1750370913/97529/b9229832/560b5ad3N054605f7.jpg" alt=""></li> <li><img src="http://img10.360buyimg.com/da/jfs/t2026/215/573306345/95654/a0211937/5618a735N1b3d8423.jpg" alt=""></li> <li><img src="http://img20.360buyimg.com/da/jfs/t2065/362/579832759/78899/6f349917/5618c680N3752bacc.jpg" alt=""></li> <li><img src="http://img10.360buyimg.com/da/jfs/t2023/45/384256123/101565/9b6e5daf/5604bdceN8c7d2ccf.jpg" alt=""></li> </ul> <ol id="num"> <li class="active">1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> <li>6</li> </ol> <a href="javascript:;" class="arrow" id="left"><</a> <a href="javascript:;" class="arrow" id="right">></a> </div></body></html>以上代码是不是很简单啊，基于javascrit实现仿金东图片轮播效果就制作成功了，由于时间原因没有给大家展示效果图，还请大家见谅。
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