代码可以优化一下

[pigLoveRabbit520]

<script>
        var dayMillionSecs = 1000 * 60 * 60 * 24;
        var hourMillionSecs = 1000 * 60 * 60;
        var minuteMillionSecs = 1000 * 60;
        var secondMillionSecs = 1000;

        function format(arg) {
            if (arg < 10)
                return '0' + arg;
            else
                return '' + arg;
        }

        function timer() {
            var start = new Date(2018, * - 1, 6); // *月6号
            var now = new Date();
            var inter = now - start;
            var days = Math.floor(inter / dayMillionSecs);
            inter = inter % dayMillionSecs;
            var hours = Math.floor(inter / hourMillionSecs);
            inter = inter % hourMillionSecs;
            var minutes = Math.floor(inter / minuteMillionSecs);
            inter = inter % minuteMillionSecs;
            var seconds = Math.floor(inter / secondMillionSecs);


            document.getElementById('d').innerHTML = format(days);
            document.getElementById('h').innerHTML = format(hours);
            document.getElementById('m').innerHTML = format(minutes);
            document.getElementById('s').innerHTML = format(seconds);
        }

        timer();
        setInterval(timer, 1000);
    </script>