asp.net同时调用JS和后台的无效的解决

 //重新发送邮箱事件
        var waitTime = 50;
        function reRendEmail() {
            var btnRe = document.getElementById("btnReRendEmail");
            if (waitTime == 0) {
                btnRe.removeAttribute("disabled");
                btnRe.value = "重新发送邮件";
                waitTime = 50;
            } else {
                btnRe.setAttribute("disabled", true);
                btnRe.setAttribute(‘value‘,waitTime + "秒后可以重新发送");
                waitTime--;
                setTimeout(function() {
                    reRendEmail();
                },
            1000)
            }
        }

 ClientScript.RegisterStartupScript(ClientScript.GetType(), "myscript", "<script>reRendEmail();</script>");