jquery实现60秒倒计时并清除定时器项目很常见；

 

var wait=60;
$('#AutoCode').text(wait+'s');
timer = setInterval(function(){
    if(wait==0){
        $('#AutoCode').text('获取验证码');
        clearInterval(timer)
    }else{
        wait--;
        $('#AutoCode').text(wait+'s');
    }
},1000);