计算历时长度

 1   // 计算时间长度开始:如果结束时间是现在
 2     function getTotalTime(startTime, endTime) {
 3         if (startTime != null && startTime != ‘‘ && startTime != "") {
 4             var startTim = new Date(startTime.replace(/-/g, "/"));
 5             // var endTime = new Date();
 6             if (endTime != null && endTime != undefined && endTime != "") {
 7                 endTime = new Date(endTime.replace(/-/g, "/"));
 8             } else {
 9                 endTime = new Date();
10             }
11             var dateDiff = endTime.getTime() - startTim.getTime();
12             var dayDiff = Math.floor(dateDiff / (24 * 3600 * 1000));
13             var leave1 = dateDiff % (24 * 3600 * 1000);
14             var hours = Math.floor(leave1 / (3600 * 1000));
15             var leave2 = leave1 % (3600 * 1000);
16             var minutes = Math.floor(leave2 / (60 * 1000));
17             var leave3 = leave2 % (60 * 1000);
18             var seconds = Math.round(leave3 / 1000);
19             return dayDiff + "天 " + hours + "小时 " + minutes + " 分钟" + seconds + " 秒";
20         } else {
21             return "";
22         }
23     }