Jquery時倒計時按鈕

Html 按鈕

< button id ="sendEmailButton" type ="button" onclick ="sendEmail()" >獲取郵箱驗證碼</button >

js

function sendEmail(){
       var count = 80;
       var countdown = setInterval(CountDown, 1000);
       function CountDown() {
       $( "#sendEmailButton").attr("disabled" , true);
       $( "#sendEmailButton").text(count+"秒後從新獲取!" );
       if (count == 0) {
       $( "#sendEmailButton").text("獲取郵箱驗證碼" ).removeAttr("disabled");
       clearInterval(countdown);
       }
       count--;
       }
}