js实现轮播图

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>轮播图</title>
 6     <style type="text/css">
 7         *{
 8             margin: 0;
 9             padding:0;
10         }
11         .carousel{
12             margin:0 auto;
13             width:400px;
14             height: 300px;
15             position: relative;
16         }
17         span{
18             width:20px;
19             height:20px;
20             background: rgba(0,0,0,.6);
21             border-radius: 50%;
22         }
23         a{
24             text-decoration: none;
25             color:#fff;
26         }
27         p{
28             width:200px;
29             text-align: center;
30             line-height: 20px;
31             position: absolute;
32             top:260px;
33             left:100px;
34             display: flex;
35             justify-content: space-around;
36         }
37     </style>
38     <script type="text/javascript">
39         window.onload =function () {
40             var aNode = document.getElementsByTagName("a");
41             var divNode = document.getElementsByTagName("div")[0];
42             var imgNode = document.createElement("img");
43             for (var position in aNode) {
44                 aNode[position].onclick = function () {
45                     var index = this.innerText;
46                     carousel(index);
47                 }
48             }
49             function carousel(index) {
50                 imgNode.src = 'images/' + index + '.jpg' + '/';
51                 divNode.appendChild(imgNode);
52             }
53             var i = 1;
54             imgNode.src = 'images/' + i + '.jpg' + '/';
55             function change() {
56                 imgNode.src = 'images/' + i + '.jpg' + '/';
57                 i++;
58                 if (i == 7) {
59                     i = 1;
60                 }
61             }
62             divNode.appendChild(imgNode);
63             setInterval(change, 1500);
64         }
65     </script>
66 </head>
67 <body>
68     <div class="carousel">
69         <p>
70             <span><a href="#" onclick="carousel(1)">1</a></span>
71             <span><a href="#" onclick="carousel(2)">2</a></span>
72             <span><a href="#" onclick="carousel(3)">3</a></span>
73             <span><a href="#" onclick="carousel(4)">4</a></span>
74             <span><a href="#" onclick="carousel(5)">5</a></span>
75             <span><a href="#" onclick="carousel(6)">6</a></span>
76         </p>
77     </div>
78 </body>
79 </html>

注意：图片需要自己去添加images文件，大小我用的是400*300，可以更改的！

还有其他方法使用js实现轮播图，比如点击以后让图片transform：translate；点击后改变其display，点击后改变z-index，不点击让他自己产生动态移动就是使用：setInterval

技术不重要，重要的是思想！