先看一眼效果图：
代码：
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <style> *{padding:0;margin:0;} #content{width:550px;height:300px;margin:50px auto;position:relative;} #content input{width:60px;height:30px;margin-right:10px;} #content div{diplay:inline-block;position:absolute;bottom:0;;border:1px solid #ccc;width:250px;height:250px;background:url(img/loader_ico.gif) no-repeat center #f1f1f1;} #content div.left{left:0;} #content div.right{right:0;} #content div span{display:inline-block;width:250px;height:30px;line-height:30px;background:#ccc;color:red;text-align:center;} #content div img {height:250px;width:250px;} </style> <script> window.onload = function () { var content = $('content'),prev = $('prev'),next = $('next'), left = $('left'),right = $('right'); var aSpan = content.getElementsByTagName('span'); var aImg = content.getElementsByTagName('img'); var arr = [ ['img/1.png','img/2.png','img/3.png','img/4.png'], ['img/2.png','img/3.png','img/4.png'] ]; var num = [0, 0]; // 初始化 for ( var i = 0; i < aSpan.length; i++ ) { carousel(i); aImg[i].index = i; aImg[i].onclick = function () { if (num[this.index] === arr[this.index].length - 1) num[this.index] = -1; num[this.index]++; carousel(this.index); } } // 下一组 next.onclick = function () { for ( var i = 0; i < aSpan.length; i++ ) { if (num[i] === arr[i].length - 1) num[i] = -1; num[i]++; carousel(i); } } // 上一组 prev.onclick = function () { for ( var i = 0; i < aSpan.length; i++ ) { if (num[i] === 0) num[i] = arr[i].length; num[i]--; carousel(i); } } function carousel(index) { aSpan[index].innerHTML = num[index] + 1 + ' / ' + arr[index].length; aImg[index].src = arr[index][num[index]]; } function $(id) {return document.getElementById(id);} } </script> </head> <body> <div> <input type="button" value="上一组" /> <input type="button" value="下一组" /> <div> <span>图片数量加载中</span> <img /> </div> <div> <span>图片数量加载中</span> <img /> </div> </div> </body> </html>
精彩专题分享：