简单的10秒倒计时

   

 1 <!DOCTYPE html>
 2 <html>
 3 <head lang="en">
 4     <meta charset="UTF-8">
 5     <title></title>
 6     <script type="text/javascript">
 7         window.onload = function(){
 8             var i = 10;
 9             var timer = setInterval(function(){
10                 if(i== -1){
11                     clearInterval(timer);
12                 }else{
13                     document.body.innerHTML = i;
14                     --i;
15                 }
16             },1000);
17  
18         }
19     </script>
20 </head>
21 <body>
22  
23 </body>
24 </html>
View Code
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原文地址：https://www.cnblogs.com/ylei11/p/6721558.html