Object-oriented ASP programming nine---client end functions

// ****************************************************************
<BR>
Script Compont Object model<br>
Design for Dhtml<br>
Copyright 2003 Version 1.0<br>
Made by Yin Dawn <BR>
// ****************************************************************
<BR>
<SCRIPT>

function Isleapyear (syear) {//year parameter error return-1 is a leap years return 1, not a leap-back 0

if ((syear%4==0) && (syear%100!=0) | | (syear%400==0))
return True
Else
return False
}

To get a specific data message from a given date a[0]=year a[1]=month A[2]=day
Date formats can be: year-month-day, year/month/day, year. Month. Day
function DatePart (strdate) {
var adate=new Array
var sdate=new String (strdate)
if (Sdate.search ("-")!=-1) {
Adate=sdate.split ("-")
}
else if (Sdate.search ("/")!=-1) {
Adate=sdate.split ("/")
}
else if (Sdate.search (".")! =-1) {
Adate=sdate.split (".")
}
Return adate
}

The following function determines the legality of a date
function Isrightdate (strdate)
{
var dp=new Array
Dp=datepart (strdate)
Return IsRightDate2 (Dp[0],dp[1],dp[2])
}

function IsRightDate2 (iyear2,imonth2,iday2)
{
var iyear=parseint (IYEAR2)
var imonth=parseint (iMonth2)
var iday=parseint (IDay2)

if (iyear<1900)
return false;
if (imonth<1| | IMONTH&GT;12)
return false;
if (iday<1| | IDAY&GT;31)
return false;
if (imonth==2)
{
if (Isleapyear (iyear))//If it is a leap year
{
if (iday>29)
return false; }
Else
{