JS显示当前年月日与星期的函数

<script language=javascript>
function dispDate(dateVal) {
DaystoAdd=dateVal
TodaysDate = new Date();
TodaysDay = new Array('Sunday', 'Monday', 'Tuesday','Wednesday', 'Thursday', 'Friday', 'Saturday');
TodaysMonth = new Array('January', 'February', 'March','April', 'May','June', 'July', 'August', 'September','October', 'November', 'December');
DaysinMonth = new Array('31', '28', '31', '30', '31', '30', '31', '31', '30', '31', '30', '31');
function LeapYearTest (Year) {
if (((Year % 400)==0) || (((Year % 100)!=0) && (Year % 4)==0)) {
return true;
}
else {
return false;
}
}
CurrentYear = TodaysDate.getYear();
if (CurrentYear < 2000)
CurrentYear = CurrentYear + 1900;
currentMonth = TodaysDate.getMonth();
DayOffset = TodaysDate.getDay();
currentDay = TodaysDate.getDate();
month = TodaysMonth[currentMonth];
if (month == 'February') {
if (((CurrentYear % 4)==0) && ((CurrentYear % 100)!=0) || ((CurrentYear % 400)==0)) {
DaysinMonth[1] = 29;
}
else {
DaysinMonth[1] = 28;
}
}
days = DaysinMonth[currentMonth];
currentDay += DaystoAdd;
if (currentDay > days) {
if (currentMonth == 11) {
currentMonth = 0;
month = TodaysMonth[currentMonth];
CurrentYear = CurrentYear + 1
}
else {
month =
TodaysMonth[currentMonth+1];
}
currentDay = currentDay - days;
}
DayOffset += DaystoAdd;
function offsettheDate (offsetCurrentDay) {
if (offsetCurrentDay > 6) {
offsetCurrentDay -= 6;
DayOffset = TodaysDay[offsetCurrentDay-1];
offsettheDate(offsetCurrentDay-1);
}
else {
DayOffset = TodaysDay[offsetCurrentDay];
return true;
}
}
offsettheDate(DayOffset);TheDate = DayOffset + ', ';
TheDate += month + ' ';
TheDate += currentDay + ', ';
if (CurrentYear<100) CurrentYear="19" + CurrentYear;
TheDate += CurrentYear;
document.write(' '+TheDate);
}
</script>