1 <!DOCTYPE html>
2 <html>
3 <head>
4 <script src="js/jquery-1.9.1.min.js"></script>
5 <script type="text/javascript">
6 var countdown=60;
7 function settime(obj) {
8 if (countdown == 0) {
9 obj.removeAttribute("disabled");
10 obj.value="获取验证码";
11 countdown = 60;
12 return;
13 } else {
14 obj.setAttribute("disabled", true);
15 obj.value="重新发送(" + countdown + ")";
16 countdown--;
17 }
18 setTimeout(function() {
19 settime(obj) }
20 ,1000)
21 }
22
23 </script>
24 <body>
25 <input type="button" value="获取验证码" onclick="settime(this)" />
26
27 </body>
28 </html>