JS倒计时

function refreshData() {
            //活动结束时间
            var gap = endTime -new Date();
            if (gap <= 0) {
                clearInterval(inter);
            }
            else {
                var result = GetTimeGroup(gap);
                $(".js-day").html(result.Day);
                $(".js-hour").html(result.Hour);
                $(".js-min").html(result.Minute);
                $(".js-sec").html(result.Second);
            }
        }


//传入js中Date差，获取结果的天时分秒，天为最终
function GetTimeGroup(gap) {
    gap = Math.floor(gap / 1000);//gap是毫秒单位，先转换为秒单位
    var seconds = Math.floor(gap % 60);//直接获取秒数
    var minutes = Math.floor(gap % 3600 / 60);//获取分
    var hours = Math.floor(gap % 85400 / 3600);//获取小时
    var days = Math.floor(gap / 85400);//天数
    var result = {
        Day: days,
        Hour: hours,
        Minute: minutes,
        Second:seconds
    }
    return result;
}