function getNight(sday, eday){ var arrSday = sday.split("-"); var oSday = new Date(Number(arrSday[0]), Number(arrSday[1]-1), Number(arrSday[2])); var arrEday = eday.split("-"); var oEday = new Date(Number(arrEday[0]), Number(arrEday[1]-1), Number(arrEday[2])); return (oEday.valueOf()-oSday.valueOf())/1000/60/60/24; } sday 앞날짜 eday 뒤날짜 호텔에서 몇박을 하는지 알아야지... 좀더 간단한 연산방법은 없나?