jQuery 验证码倒计时

/**
 *  验证码倒计时
 * @param obj
 * @param hint 还原内容
 */
function count(obj,hint) {
    var numTime = 60;
    var time = setInterval(function () {
        numTime--;
        console.log(numTime);
        obj.html(numTime+"s");
        if(numTime==1){
            clearInterval(time);
            obj.html(hint);
            obj.attr('disabled',false);
        }
    },1000)
}