in said:
I'm looking for a mod 10 script that you know to work well. I have googled
and found a few different ones but I would like a 2nd opinion. If you can
please link me to a mod 10 script that you have used/implimented I would
appreciate it.
Ideally I would like a vbscript over javascript so we can have it
implimented on an access db as well.
Thanks.
The best article I found on that subject is still available here:
http://www.sitepoint.com/article/card-validation-class-php
And here is a VBScript version of that.
<%Const CARD_TYPE_MC = 0
Const CARD_TYPE_VS = 1
Const CARD_TYPE_AX = 2
Const CARD_TYPE_DC = 3
Const CARD_TYPE_DS = 4
Const CARD_TYPE_JC = 5
Dim msCCName, msCCType, msCCNumber, msCCExpMonth, msCCExpYear
Function Mod10(sNumber)
Dim CardNumber: CardNumber = StrReverse(sNumber)
Dim NumberSum: NumberSum = 0
Dim lngN
For lngN = 1 To Len(CardNumber)
Dim CurrentNumber: CurrentNumber = Mid(CardNumber, lngN, 1)
' Double every second digit
If (lngN Mod 2 = 0) Then CurrentNumber = CurrentNumber * 2
' Add digits of 2-digit numbers together
If (CurrentNumber > 9) Then
Dim FirstNumber: FirstNumber = CurrentNumber Mod 10
Dim SecondNumber: SecondNumber = (CurrentNumber - FirstNumber) / 10
CurrentNumber = FirstNumber + SecondNumber
End If
NumberSum = NumberSum + CurrentNumber
Next
Mod10 = ((NumberSum Mod 10) = 0)
End Function
Function ValidateCreditCard(CCName, CCType, CCNumber, CCExpMonth, CCExpYear)
'
http://www.sitepoint.com/print/card-validation-class-php
'* Mastercard: Must have a prefix of 51 to 55, and must be 16 digits in length.
'* Visa: Must have a prefix of 4, and must be either 13 or 16 digits in length.
'* American Express: Must have a prefix of 34 or 37, and must be 15 digits in length.
'* Diners Club: Must have a prefix of 300 to 305, 36, or 38, and must be 14 digits in length.
'* Discover: Must have a prefix of 6011, and must be 16 digits in length.
'* JCB: Must have a prefix of 3, 1800, or 2131, and must be either 15 or 16 digits in length.
ValidateCreditCard = False
If ((Len(CCName) = 0) Or (Len(CCType) = 0) Or (Len(CCNumber) = 0) Or (Len(CCExpMonth) = 0) Or (Len(CCExpYear) = 0)) Then Exit Function
msCCName = CCName
Select Case LCase(CCType)
Case "mc":
Case "mastercard":
Case "m":
Case "1":
msCCType = CARD_TYPE_MC
Case "vs":
Case "visa":
Case "v":
Case "2":
msCCType = CARD_TYPE_VS
Case "ax":
Case "american express":
Case "a":
Case "3":
msCCType = CARD_TYPE_AX
Case "dc":
Case "diners club":
Case "4":
msCCType = CARD_TYPE_DC
Case "ds":
Case "discover":
Case "5":
msCCType = CARD_TYPE_DS
Case "jc":
Case "jcb":
Case "6":
msCCType = CARD_TYPE_JC
Case Else
Exit Function
End Select
Dim regEx: Set regEx = New RegExp
regEx.Pattern = "[^0-9]"
regEx.IgnoreCase = True
regEx.Global = True
msCCNumber = regEx.Replace(CCNumber, "")
Dim CurrentYear: CurrentYear = Year(Now())
If ((Len(msCCNumber) = 0) Or (CCExpMonth < 1) Or (CCExpMonth > 12) Or (CCExpYear < CurrentYear) Or (CCExpYear > (CurrentYear + 10))) Then Exit Function
msCCExpMonth = CCExpMonth
msCCExpYear = CCExpYear
Select Case msCCType
Case CARD_TYPE_MC:
Dim ValidFormat: ValidFormat = "^5[1-5][0-9]{14}$"
Case CARD_TYPE_VS:
ValidFormat = "^4[0-9]{12}([0-9]{3})?$"
Case CARD_TYPE_AX:
ValidFormat = "^3[47][0-9]{13}$"
Case CARD_TYPE_DC:
ValidFormat = "^3(0[0-5]|[68][0-9])[0-9]{11}$"
Case CARD_TYPE_DS:
ValidFormat = "^6011[0-9]{12}$"
Case CARD_TYPE_JC:
ValidFormat = "^(3[0-9]{4}|2131|1800)[0-9]{11}$"
Case Else:
ValidFormat = False
End Select
regEx.Pattern = ValidFormat
ValidateCreditCard = regEx.Test(msCCNumber) And Mod10(msCCNumber)
End Function%>
