JS实例之图片轮播，实现图片播放效果

 1 <head>
 2 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 3 <title>无标题文档</title>
 4 <style type="text/css">
 5 *{margin:0px auto;padding:0px;}
 6 #wai{width:500px;height:200px;}
 7 </style>
 8 </head>
 9 
10 <body>
11 <div id="wai">
12     <img src="file:///D|/我的文档/图片收藏/6cd51674jw1e1q9gwhvwjj.jpg" class="img" width="500" height="200"/>
13     <img src="file:///D|/我的文档/图片收藏/6cd51674jw1e3cddnbahhj.jpg" class="img" width="500" height="200" style="display:none";/>
14 </div>
15 </body>
16 <script type="text/javascript">
17 var suoyin=0;
18 var img=document.getElementsByClassName("img");
19 huan();
20 function huan(){
21     xianshi();
22     if(suoyin>=img.length-1){
23         suoyin=0;
24     }else{
25         suoyin++;
26     }
27     window.setTimeout("huan()",2000);
28 }
29 
30 function xianshi(){
31     for(var i=0;i<img.length;i++){
32         img[i].style.display="none";
33     }
34     img[suoyin].style.display="block";
35 }
36 
37 </script>
38 </html>