【JS】小工具

带天数的倒计时

function countDown(dateline){
    var timer=null,
        //倒计时
        current_time=Math.floor(new Date().getTime()/1000),
        times=dateline-current_time;
    if(times>0){
        timer=setInterval(function(){
            var day=0,
                hour=0,
                minute=0,
                second=0;//时间默认值
            if(times > 0){
                day = Math.floor(times / (60 * 60 * 24));
                hour = Math.floor((times- day * 24*60 * 60) / (60 * 60)) ;
                minute = Math.floor((times- (day * 24 * 60* 60) - (hour * 60* 60) )/ 60) ;
                second = Math.floor(times) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);
            }
            if (day <= 9) day = '0' + day;
            if (hour <= 9) hour = '0' + hour;
            if (minute <= 9) minute = '0' + minute;
            if (second <= 9) second = '0' + second;
            //
            $('#day').html(day);
            $('#hour').html(hour);
            $('#minute').html(minute);
            $('#second').html(second);
            times--;
        },1000);
        if(times<=0){
            clearInterval(timer);
        }
    }else{
        $('#day').html('00');
        $('#hour').html('00');
        $('#minute').html('00');
        $('#second').html('00');
    }
}