alert(GetDateDiff("2018-02-27 19:20:22","2018-02-27 09:20:22","hour"));function GetDateDiff(startTime, endTime, diffType) {//將xxxx-xx-xx的時間格式，轉換為 xxxx/xx/xx的格式 startTime = startTime.replace(/\-/g, "/");endTime = endTime.replace(/\-/g, "/");//將計算間隔類性字符轉換為小寫diffType = diffType.toLowerCase();var sTime =new Date(startTime); //開始時間var eTime =new Date(endTime); //結束時間//作為除數的數字var timeType =1;switch (diffType) {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));
}