jQuery实现60秒发送验证码效果

<!DOCTYPE html>
<html>
<head>

 <meta  http-equiv="content-type" content="text/html; charset=UTF-8">
 <meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no" id="viewport" name="viewport">
 <title></title>
<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>

posted @ 2016-11-30 09:59  百里图图  阅读(409)  评论(0)    收藏  举报