/*
* Script Name: ccvalidate.js
* Written By: Kevin King (Kevin@PrecisOnline.com)
* for Precision Solutions, Inc. (http://www.PrecisOnline.com)
*
* Date: 28 Oct 2002
*
* Description: This script validates the basic accuracy of a credit card
* number. It expects the card type and card number to have
* been entered/selected, and then the verifyCard function can
* be called to verify the accuracy of the card number.
*
* This script does not ensure that the card is active, so it
* is possible that while the card number is accurate, the card
* itself may have been deactivated by the issuer (i.e. for lost
* or stolen cards).
*
* THIS SOFTWARE IS PROVIDED AS-IS AND AUTHOR PROVIDES NO
* WARRANTIES, EITHER EXPRESSED OR IMPLIED, REGARDING THE
* APPLICABILITY OR FITNESS OF THIS SOFTWARE FOR ANY SPECIFIC
* PURPOSE.
*
* By using this software, you implicitly warrant your use
* will conform to normal legitimate business purposes. Author
* is not responsible for, and will assist authorities in the
* prosecution of, any use of this software that is in violation
* of United States or international law.
*
*****************************************************************************
* Modifications
*****************************************************************************
* Date..... Changed By..... Description of Change..........................
* 30 Jan 06 Kevin King Added Australian BankCard support per details
* received from Paul Bronshteyn (thanks again,
* Paul!).
* 28 Jan 06 Kevin King Corrected Delta rules as identified by Paul
* Bronshteyn (thanks Paul!).
* 26 Jan 06 Kevin King Added checkCvc function to verify CVV/CID values.
* 20 Jan 06 Kevin King Updated Maestro and Solo rules per
* http://www.barclaycardmerchantservices.co.uk/existing_customers/operational/pdf/binranges.pdf
* 16 Mar 05 Kevin King Updated to add Delta and Maestro card support.
* 05 Apr 03 Kevin King Updated SWITCH card validation table. Added
* support for validating SOLO cards.
*/
var cc_checksum; // Number: The calculated checksum for the card
var cc_fail_reason; // Text: Explains the reason for the failure
var cc_switch_startDateLength; // Number: Count of digits in start date or 0=no start date (Switch/SOLO)
var cc_switch_issueLength; // Number: Count of digits in issue number or 0=no issue number (Switch/SOLO)
var cc_cvc_length; // Number: Count of digits in CVV2
/*
*****************************************************************************
* Verify the check digit
*****************************************************************************
*/
function luhnCheck(cardNbr)
{
var result = true;
var ndx = cardNbr.length - 1;
var checkDigit = cardNbr.substr(ndx,1);
var multiplier = 2;
var accum = 0;
while(ndx)
{
var cardCh = cardNbr.substr(ndx - 1,1);
if(cardCh >= 0 && cardCh <= 9)
{
var thisValue = cardCh * multiplier;
while(thisValue > 0)
{
accum += Math.floor(thisValue % 10);
thisValue = Math.floor(thisValue / 10);
}
multiplier = (multiplier == 2 ? 1 : 2);
}
ndx--;
}
cc_checksum = ((10 - (accum % 10)) % 10);
if(cc_checksum != checkDigit)
result = false;
return(result);
}
/*
*****************************************************************************
* Verify the card number is all numbers
*****************************************************************************
*/
function checkDigits(cardNbr)
{
var result = true;
var ndx;
for(ndx = 0 ; ndx < cardNbr.length && result ; ++ndx)
{
var cardCh = cardNbr.substr(ndx,1);
if(cardCh < '0' || cardCh > '9')
result = false;
}
return(result);
}
/*
*****************************************************************************
* Verify the prefix and length is proper for this type of card
*****************************************************************************
*/
function checkPrefixAndLength(cardType, cardNbr)
{
var result = false;
var amexRules = new Array("37,37,15,3","34,34,15,3");
var discRules = new Array("6011,6011,16");
var dinersRules = new Array("36,36,14","38,38,14","300,305,14");
var enrouteRules = new Array("2014,2014,15","2149,2149,15");
var jcbRules = new Array("3,3,16","2131,2131,15","1800,1800,15");
var mcRules = new Array("51,55,16,3");
var visaRules = new Array("4,4,13,3","4,4,16,3");
var switchRules = new Array("490302,490309,18,,1","490335,490339,18,,1","491101,491102,16,,1",
"491174,491182,18,,1","493600,493699,19,,1","564182,564182,16,,2",
"633300,633300,16,,0","633301,633301,19,,1","633302,633349,16,,0",
"675900,675900,16,,0","675901,675901,19,,1","675902,675904,16,,0",
"675905,675905,19,,1","675906,675917,16,,0","675918,675918,19,,1",
"675919,675937,16,,0","675938,675940,18,,1","675941,675949,16,,0",
"675950,675962,19,,1","675963,675997,16,,0","675998,675998,19,,1",
"675999,675999,16,,0");
var soloRules = new Array("633450,633453,16,,0","633454,633457,16,,0","633458,633460,16,,0",
"633461,633461,18,,1","633462,633472,16,,0","633473,633473,18,,1",
"633474,633475,16,,0","633476,633476,19,,1","633477,633477,16,,0",
"633478,633478,18,,1","633479,633480,16,,0","633481,633481,19,,1",
"633482,633489,16,,0","633490,633493,16,,1","633494,633494,18,,1",
"633495,633497,16,,2","633498,633498,19,,1","633499,633499,18,,1",
"676700,676700,16,,0","676701,676701,19,,1","676702,676702,16,,0",
"676703,676703,18,,1","676704,676704,16,,0","676705,676705,19,,1",
"676706,676707,16,,2","676708,676711,16,,0","676712,676715,16,,0",
"676716,676717,16,,0","676718,676718,19,,1","676719,676739,16,,0",
"676740,676740,18,,1","676741,676749,16,,0","676750,676762,19,,1",
"676763,676769,16,,0","676770,676770,19,,1","676771,676773,16,,0",
"676774,676774,18,,1","676775,676778,16,,0","676779,676779,18,,1",
"676780,676781,16,,0","676782,676782,18,,1","676783,676794,16,,0",
"676795,676795,18,,1","676796,676797,16,,0","676798,676798,19,,1",
"676799,676799,16,,0");
var maestroRules = new Array("490303,490303,16/18/19","493698,493699,16/18/19","633302,633349,16/18/19",
"675900,675999,16/18/19");
var deltaRules = new Array("413733,413737,16","446200,446299,16","453978,453979,16",
"454313,454313,16","454432,454435,16","454742,454742,16",
"456725,456745,16","465830,465879,16","465901,465950,16",
"484409,484410,16","490960,490979,16","492181,492182,16",
"498824,498824,16");
var abcRules = new Array("560,651,16");
var thisRules;
switch(cardType)
{
case "A" : thisRules = amexRules;
break;
case "D" : thisRules = discRules;
break;
case "DC" : thisRules = dinersRules;
break;
case "E" : thisRules = enrouteRules;
break;
case "J" : thisRules = jcbRules;
break;
case "M" : thisRules = mcRules;
break;
case "S" : thisRules = switchRules;
break;
case "SO" : thisRules = soloRules;
break;
case "V" : thisRules = visaRules;
break;
case "MA" : thisRules = maestroRules;
break;
case "DA" : thisRules = deltaRules;
break;
case "AB" : thisRules = abcRules;
break;
default : thisRules = new Array();
break;
}
var ndx;
var ruleDetails;
for(ndx = 0 ; ndx < thisRules.length && !result ; ++ndx)
{
thisRule = thisRules[ndx];
ruleDetails = thisRule.split(",");
var hiPrefix = ruleDetails[0];
var loPrefix = ruleDetails[1];
var valLengths = ruleDetails[2].split("/");
var cvcLength = ruleDetails[3]
var issueLength = ruleDetails[4];
var startDateLength = ruleDetails[5];
/*
* Verify card number length
*/
var cardPrefix = cardNbr.substr(0,hiPrefix.length);
if(cardPrefix >= hiPrefix && cardPrefix <= loPrefix)
{
if(valLengths[0] != 0)
{
result = false;
for(lengthNdx = 0 ; lengthNdx < valLengths.length && !result ; ++lengthNdx)
{
if(cardNbr.length == valLengths[lengthNdx])
{
result = true;
}
}
}
else
{
result = true;
}
if(result)
{
}
if(result)
{
cc_switch_startDateLength = startDateLength;
cc_switch_issueLength = issueLength;
cc_cvc_length = cvcLength;
}
}
}
return(result);
}
/*
*****************************************************************************
* Returns the name of the card type (for errors)
*****************************************************************************
*/
function cardTypeName(cardType)
{
var result;
switch(cardType)
{
case "A" : result = "American Express";
break;
case "D" : result = "Discover";
break;
case "DC": result = "Diners Club";
break;
case "E" : result = "Enroute"
break;
case "J" : result = "JCB";
break;
case "M" : result = "MasterCard";
break;
case "S" : result = "Switch";
break;
case "SO": result = "SOLO";
break;
case "V" : result = "VISA";
break;
case "MA": result = "Maestro";
break;
case "DA": result = "Delta";
break;
case "AB": result = "Australian BankCard";
break;
default : result = "unknown";
break;
}
return(result);
}
/*
*****************************************************************************
* Validate card verification code (CVV2/CID)
*****************************************************************************
*/
function checkCvc(cardCvc)
{
var result = true;
if(cc_cvc_length > 0)
{
result = (cardCvc.length == cc_cvc_length);
}
return(result);
}
/*
*****************************************************************************
* Verify the card number
*****************************************************************************
* Incoming Parameters:
* cardType: A - American Express
* AB - Australian BankCard
* D - Discover
* DA - Delta
* DC - Diners Club
* E - Enroute
* J - JCB
* M - MasterCard
* MA - Maestro
* S - Switch
* SO - SOLO
* V - VISA
* cardNbr: Numeric card number, appropriate length determined by card
* type/prefix.
*
*/
function verifyCard(cardType,cardNbr)
{
var result = true;
if(cardNbr != "")
{
result = checkDigits(cardNbr);
if(result == true)
{
result = checkPrefixAndLength(cardType,cardNbr);
if(result == true)
{
result = luhnCheck(cardNbr);
if(result == false)
{
cc_fail_reason = "Incorrect checksum";
}
}
else
{
cc_fail_reason = "Card length or type is incorrect";
}
}
else
{
cc_fail_reason = "Card number must be fully numeric";
}
if (result == false)
{
alert("The " + cardTypeName(cardType) + " card number entered is incorrect!");
}
}
else
result = false;
return(result);
}
|
Precision Solutions, Inc. 
2079 Skylark Court Longmont, CO 80503 Phone: 303-651-7050
Email: Info@PrecisOnline.com Web: http://www.PrecisOnline.com