计算两个时间之间的天数、小时等

function GetDate(startTime, endTime, diffType) {    //将xxxx-xx-xx的时间格式，转换为 xxxx/xx/xx的格式    start_time = startTime.replace(/\-/g, "/");    end_time = endTime.replace(/\-/g, "/");    //将计算间隔类性字符转换为小写    diff_type = diffType.toLowerCase();    var sTime =new Date(start_time); //开始时间    var eTime =new Date(end_time); //结束时间    //作为除数的数字    var timeType =1;    switch (diff_type) {        case"second":            timeType =1000;            break;        case"minute":            timeType =1000*60;            break;        case"hour":            timeType =1000*3600;            break;        case"day":            timeType =1000*3600*24;            break;        default:break;    }    return parseInt((eTime.getTime() - sTime.getTime()) / parseInt(timeType));}alert(GetDate("2018-09-14 00:00:00","2018-09-14 11:33:22","day"));

来源：https://www.cnblogs.com/zhouyideboke/p/9645111.html