<script>
var starttime = Date.parse(new Date('2018/8/1'))+15*60*60*1000; //8月1号15点
setInterval(function () {
var nowtime = Date.parse(new Date());
var time = starttime - nowtime;
var day = parseInt(time / 1000 / 60 / 60 / 24);
var hour = parseInt(time / 1000 / 60 / 60 % 24);
var minute = parseInt(time / 1000 / 60 % 60);
var seconds = parseInt(time / 1000 % 60);
$('.day').html(day)
$('.hour').html(hour)
$('.minute').html(minute)
$('.seconds').html(seconds)
}, 1000);
</script>
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