/* -- 計算兩個字元(YYYY-MM-DD)的日期相隔天數 -- */
function Date_Compare(asStartDate,asEndDate){
var miStart = Date.parse(asStartDate.replace(//-/g, '/'));
var miEnd = Date.parse(asEndDate.replace(//-/g, '/'));
return (miEnd-miStart)/(1000*24*3600);
} /*-- 判斷一個字串(YYYY-MM-DD)的日期是否正確 -- */
function Date_istrue(asDate){
var lsDate = asDate + "";
var loDate = lsDate.split("-");
if (loDate.length!=3) return false;
var liYear = parseInt(loDate[0]);
var liMonth = parseInt(loDate[1]);
var liDay = parseInt(loDate[2]);
if ((loDate[0].length>4)||(loDate[1].length>2)||(loDate[2].length>2)) return false;
if (isNaN(liYear)||isNaN(liMonth)||isNaN(liDay)) return false;
if ((liYear<1900)||(liYear>3000)) return false;
if ((liMonth>12)||(liMonth<=0)) return false;
if (Date_getDay(liYear,liMonth)<liDay) return false;
return !isNaN(Date.UTC(liYear,liMonth,liDay));
} /*-- 返回某年某月的天數-- */
function Date_getDay(aiYear,aiMonth){
var loDay = [0,31,28,31,30,31,30,31,31,30,31,30,31];
if (aiYear%4==0) loDay[2] = 29;
return loDay[aiMonth];
} |
