js获取时间差值

 1 function gettime(firstdate, seconddate) {
 2     // 1.对事件进行处理
 3     var firsttime = date.parse(firstdate + " 00:00:00");
 4     var secondtime = date.parse(seconddate + " 00:00:00");
 5     // 2.获取时间间隔
 6     var timespan = secondtime - firsttime;
 7     // 3.获取天
 8     var day = math.floor(timespan / 1000 / 60 / 60 / 24);
 9     // 4.获取小时
10     var hour = math.floor(timespan / 1000 / 60 / 60);
11     // 5.获取分钟
12     var minute = math.floor(timespan / 1000 / 60 - hour * 60);
13     // 6.获取秒
14     var second = timespan / 1000 - hour * 60 * 60 - minute * 60;
15     return day + "@" + hour + "@" + minute + "@" + second;
16 }