96 lines
3.7 KiB
JavaScript
96 lines
3.7 KiB
JavaScript
/*
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* jQuery creditcard2 extension for the jQuery Validation plugin (http://plugins.jquery.com/project/validate).
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* Ported from http://www.braemoor.co.uk/software/creditcard.shtml by John Gardner, with some enhancements.
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*
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* Author: Jack Killpatrick
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* Copyright (c) 2010 iHwy, Inc.
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*
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* Version 1.0.1 (1/12/2010)
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* Tested with jquery 1.2.6, but will probably work with earlier versions.
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*
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* History:
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* 1.0.0 - released 2008-11-17
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* 1.0.1 - released 2010-01-12 -> updated card prefixes based on data at: http://en.wikipedia.org/wiki/Credit_card_number and added support for LaserCard
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*
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* Visit http://www.ihwy.com/labs/jquery-validate-credit-card-extension.aspx for usage information
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*
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* Dual licensed under the MIT and GPL licenses:
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* http://www.opensource.org/licenses/mit-license.php
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* http://www.gnu.org/licenses/gpl.html
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*/
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function validateCC(cardNo, cardName)
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{
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//jQuery.validator.addMethod("creditcard2", function(value, element, param) {
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var cards = new Array();
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cards[0] = { cardName: "Visa", lengths: "13,16", prefixes: "4", checkdigit: true };
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cards[1] = { cardName: "MasterCard", lengths: "16", prefixes: "51,52,53,54,55", checkdigit: true };
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cards[2] = { cardName: "DinersClub", lengths: "14,16", prefixes: "305,36,38,54,55", checkdigit: true };
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cards[3] = { cardName: "CarteBlanche", lengths: "14", prefixes: "300,301,302,303,304,305", checkdigit: true };
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cards[4] = { cardName: "AmEx", lengths: "15", prefixes: "34,37", checkdigit: true };
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cards[5] = { cardName: "Discover", lengths: "16", prefixes: "6011,622,64,65", checkdigit: true };
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cards[6] = { cardName: "JCB", lengths: "16", prefixes: "35", checkdigit: true };
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cards[7] = { cardName: "enRoute", lengths: "15", prefixes: "2014,2149", checkdigit: true };
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cards[8] = { cardName: "Solo", lengths: "16,18,19", prefixes: "6334, 6767", checkdigit: true };
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cards[9] = { cardName: "Switch", lengths: "16,18,19", prefixes: "4903,4905,4911,4936,564182,633110,6333,6759", checkdigit: true };
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cards[10] = { cardName: "Maestro", lengths: "12,13,14,15,16,18,19", prefixes: "5018,5020,5038,6304,6759,6761", checkdigit: true };
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cards[11] = { cardName: "VisaElectron", lengths: "16", prefixes: "417500,4917,4913,4508,4844", checkdigit: true };
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cards[12] = { cardName: "LaserCard", lengths: "16,17,18,19", prefixes: "6304,6706,6771,6709", checkdigit: true };
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var cardType = -1;
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for (var i = 0; i < cards.length; i++) {
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if (cardName.toLowerCase() == cards[i].cardName.toLowerCase()) {
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cardType = i;
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break;
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}
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}
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if (cardType == -1) { return false; } // card type not found
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cardNo = cardNo.replace(/[\s-]/g, ""); // remove spaces and dashes
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if (cardNo.length == 0) { return false; } // no length
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var cardexp = /^[0-9]{13,19}$/;
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if (!cardexp.exec(cardNo)) { return false; } // has chars or wrong length
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cardNo = cardNo.replace(/\D/g, ""); // strip down to digits
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if (cards[cardType].checkdigit) {
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var checksum = 0;
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var mychar = "";
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var j = 1;
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var calc;
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for (i = cardNo.length - 1; i >= 0; i--) {
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calc = Number(cardNo.charAt(i)) * j;
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if (calc > 9) {
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checksum = checksum + 1;
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calc = calc - 10;
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}
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checksum = checksum + calc;
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if (j == 1) { j = 2 } else { j = 1 };
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}
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if (checksum % 10 != 0) { return false; } // not mod10
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}
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var lengthValid = false;
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var prefixValid = false;
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var prefix = new Array();
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var lengths = new Array();
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prefix = cards[cardType].prefixes.split(",");
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for (i = 0; i < prefix.length; i++) {
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var exp = new RegExp("^" + prefix[i]);
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if (exp.test(cardNo)) prefixValid = true;
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}
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if (!prefixValid) { return false; } // invalid prefix
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lengths = cards[cardType].lengths.split(",");
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for (j = 0; j < lengths.length; j++) {
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if (cardNo.length == lengths[j]) lengthValid = true;
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}
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if (!lengthValid) { return false; } // wrong length
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return true;
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}
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