- html
- <input type="button" id="btn" value="免费获取验证码" onclick="settime(this)" />
- JS
- // 短信验证码倒计时
- var countdown=60;
- function settime(obj) {
- if (countdown == 0) {
- obj.removeAttribute("disabled");
- obj.value="免费获取验证码";
- countdown = 60;
- return;
- } else {
- obj.setAttribute("disabled", true);
- obj.value="重新发送 (" + countdown + ")";
- countdown--;
- }
- setTimeout(function() {
- settime(obj) }
- ,1000)
- }
来源: http://www.bubuko.com/infodetail-2812852.html