计算历时长度

  // 计算时间长度开始:如果结束时间是现在
    function getTotalTime(startTime, endTime) {
        if (startTime != null && startTime != '' && startTime != "") {
            var startTim = new Date(startTime.replace(/-/g, "/"));
            // var endTime = new Date();
            if (endTime != null && endTime != undefined && endTime != "") {
                endTime = new Date(endTime.replace(/-/g, "/"));
            } else {
                endTime = new Date();
            }
            var dateDiff = endTime.getTime() - startTim.getTime();
            var dayDiff = Math.floor(dateDiff / (24 * 3600 * 1000));
            var leave1 = dateDiff % (24 * 3600 * 1000);
            var hours = Math.floor(leave1 / (3600 * 1000));
            var leave2 = leave1 % (3600 * 1000);
            var minutes = Math.floor(leave2 / (60 * 1000));
            var leave3 = leave2 % (60 * 1000);
            var seconds = Math.round(leave3 / 1000);
            return dayDiff + "天 " + hours + "小时 " + minutes + " 分钟" + seconds + " 秒";
        } else {
            return "";
        }
    }