倒计时

<script>
    var dateThe =  new Date()
    function loveTime() {
        var date=dateThe - new Date().setDate(new Date().getDate() -3) ;
        console.log(date)
        var days = Math.floor(date / 1000 / 60 / 60 / 24) // 从这里开始
        var daysmod = date - days * 24 *60 * 60 * 1000
        var hours = Math.floor(daysmod / 1000 / 60 / 60)
        var hoursmod = date - (days * 24 *60 * 60 * 1000) - (hours * 1000 * 60 * 60)
        var minutes = Math.floor(hoursmod / 1000 / 60)
        var minutesmod = date - (days * 24 *60 * 60 * 1000) - (hours * 1000 * 60 * 60) - (minutes * 1000 * 60)
        var seconds = Math.floor(minutesmod / 1000) // 到这里结束，是将总毫秒转化成对应天数+小时数+分钟数+秒数的转换方法
        $('#day').text(days);
        $('#hour').text(hours);
        $('#min').text(minutes);
        $('#ss').text(seconds);
    }
    $(function () {
        setInterval("loveTime()",1000);
    })
</script>