[转自] http://q.cnblogs.com/q/45695/
1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="utf-8">
5 <title>获取验证码</title>
6 <script src="http://cdn.bootcss.com/jquery/1.11.2/jquery.min.js" ></script>
7 <script type="text/javascript">
8 $(function () {
9 $("#btnCode").click(function () {
10 // alert(‘message‘);
11 //执行获取验证码的操作
12 GetNumber();
13 });
14 });
15 var count = 3;
16 function GetNumber() {
17 $("#btnCode").attr("disabled", "disabled");
18 $("#btnCode").val(count + "秒之后点击获取")
19 count--;
20 console.log(count);
21 if (count > 0) {
22 setTimeout(GetNumber, 1000);
23 }
24 else {
25 $("#btnCode").val("点击获取验证码");
26 $("#btnCode").removeAttr("disabled");
27 count = 3;//注意此处需添加count = 3
28 }
29 }
30 </script>
31 </head>
32 <body>
33 <form>
34 <input id="btnCode" type="button" value="点击获取验证码"/>
35 </form>
36 </body>
37 </html>
时间： 2024-08-29 06:06:52