<!DOCTYPE html>
<html>
<head>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
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)
}
 
</script>
<body>
<input type="button" id="btn" value="免费获取验证码" onclick="settime(this)" />
 
</body>
</html>

版权声明：本文为family-626-77原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://www.cnblogs.com/family-626-77/p/5430638.html