Phiên bản đầy đủ: jsB@nk » Ứng dụng » Kiểm tra thời hạn tài khoản
URL: https://www.javascriptbank.com/validation-credit-card.html
Một đoạn mã JavaScript hữu ích cho việc kiểm tra thời hạn sử dụng tài khoản một số loại thẻ tín dụng/thanh toán.
Phiên bản đầy đủ: jsB@nk » Ứng dụng » Kiểm tra thời hạn tài khoản
URL: https://www.javascriptbank.com/validation-credit-card.html
<SCRIPT LANGUAGE="JavaScript">// Simon Tneoh (tneohcb@pc.jaring.my)<!-- Beginvar Cards = new makeArray(8);Cards[0] = new CardType("MasterCard", "51,52,53,54,55", "16");var MasterCard = Cards[0];Cards[1] = new CardType("VisaCard", "4", "13,16");var VisaCard = Cards[1];Cards[2] = new CardType("AmExCard", "34,37", "15");var AmExCard = Cards[2];Cards[3] = new CardType("DinersClubCard", "30,36,38", "14");var DinersClubCard = Cards[3];Cards[4] = new CardType("DiscoverCard", "6011", "16");var DiscoverCard = Cards[4];Cards[5] = new CardType("enRouteCard", "2014,2149", "15");var enRouteCard = Cards[5];Cards[6] = new CardType("JCBCard", "3088,3096,3112,3158,3337,3528", "16");var JCBCard = Cards[6];var LuhnCheckSum = Cards[7] = new CardType();/*************************************************************************\CheckCardNumber(form)function called when users click the "check" button.\*************************************************************************/function CheckCardNumber(form) {var tmpyear;if (form.CardNumber.value.length == 0) {alert("Please enter a Card Number.");form.CardNumber.focus();return;}if (form.ExpYear.value.length == 0) {alert("Please enter the Expiration Year.");form.ExpYear.focus();return;}if (form.ExpYear.value > 96)tmpyear = "19" + form.ExpYear.value;else if (form.ExpYear.value < 21)tmpyear = "20" + form.ExpYear.value;else {alert("The Expiration Year is not valid.");return;}tmpmonth = form.ExpMon.options[form.ExpMon.selectedIndex].value;// The following line doesn't work in IE3, you need to change it// to something like "(new CardType())...".// if (!CardType().isExpiryDate(tmpyear, tmpmonth)) {if (!(new CardType()).isExpiryDate(tmpyear, tmpmonth)) {alert("This card has already expired.");return;}card = form.CardType.options[form.CardType.selectedIndex].value;var retval = eval(card + ".checkCardNumber(\"" + form.CardNumber.value +"\", " + tmpyear + ", " + tmpmonth + ");");cardname = "";if (retval)// comment this out if used on an order formalert("This card number appears to be valid.");else {// The cardnumber has the valid luhn checksum, but we want to know which// cardtype it belongs to.for (var n = 0; n < Cards.size; n++) {if (Cards[n].checkCardNumber(form.CardNumber.value, tmpyear, tmpmonth)) {cardname = Cards[n].getCardType();break; }}if (cardname.length > 0) {alert("This looks like a " + cardname + " number, not a " + card + " number.");}else {alert("This card number is not valid."); } }}/*************************************************************************\Object CardType([String cardtype, String rules, String len, int year, int month])cardtype : type of card, eg: MasterCard, Visa, etc.rules : rules of the cardnumber, eg: "4", "6011", "34,37".len : valid length of cardnumber, eg: "16,19", "13,16".year : year of expiry date.month : month of expiry date.eg:var VisaCard = new CardType("Visa", "4", "16");var AmExCard = new CardType("AmEx", "34,37", "15");\*************************************************************************/function CardType() {var n;var argv = CardType.arguments;var argc = CardType.arguments.length;this.objname = "object CardType";var tmpcardtype = (argc > 0) ? argv[0] : "CardObject";var tmprules = (argc > 1) ? argv[1] : "0,1,2,3,4,5,6,7,8,9";var tmplen = (argc > 2) ? argv[2] : "13,14,15,16,19";this.setCardNumber = setCardNumber; // set CardNumber method.this.setCardType = setCardType; // setCardType method.this.setLen = setLen; // setLen method.this.setRules = setRules; // setRules method.this.setExpiryDate = setExpiryDate; // setExpiryDate method.this.setCardType(tmpcardtype);this.setLen(tmplen);this.setRules(tmprules);if (argc > 4)this.setExpiryDate(argv[3], argv[4]);this.checkCardNumber = checkCardNumber; // checkCardNumber method.this.getExpiryDate = getExpiryDate; // getExpiryDate method.this.getCardType = getCardType; // getCardType method.this.isCardNumber = isCardNumber; // isCardNumber method.this.isExpiryDate = isExpiryDate; // isExpiryDate method.this.luhnCheck = luhnCheck;// luhnCheck method.return this;}/*************************************************************************\boolean checkCardNumber([String cardnumber, int year, int month])return true if cardnumber pass the luhncheck and the expiry date isvalid, else return false.\*************************************************************************/function checkCardNumber() {var argv = checkCardNumber.arguments;var argc = checkCardNumber.arguments.length;var cardnumber = (argc > 0) ? argv[0] : this.cardnumber;var year = (argc > 1) ? argv[1] : this.year;var month = (argc > 2) ? argv[2] : this.month;this.setCardNumber(cardnumber);this.setExpiryDate(year, month);if (!this.isCardNumber())return false;if (!this.isExpiryDate())return false;return true;}/*************************************************************************\String getCardType()return the cardtype.\*************************************************************************/function getCardType() {return this.cardtype;}/*************************************************************************\String getExpiryDate()return the expiry date.\*************************************************************************/function getExpiryDate() {return this.month + "/" + this.year;}/*************************************************************************\boolean isCardNumber([String cardnumber])return true if cardnumber pass the luhncheck and the rules, else returnfalse.\*************************************************************************/function isCardNumber() {var argv = isCardNumber.arguments;var argc = isCardNumber.arguments.length;var cardnumber = (argc > 0) ? argv[0] : this.cardnumber;if (!this.luhnCheck())return false;for (var n = 0; n < this.len.size; n++)if (cardnumber.toString().length == this.len[n]) {for (var m = 0; m < this.rules.size; m++) {var headdigit = cardnumber.substring(0, this.rules[m].toString().length);if (headdigit == this.rules[m])return true;}return false;}return false;}/*************************************************************************\boolean isExpiryDate([int year, int month])return true if the date is a valid expiry date,else return false.\*************************************************************************/function isExpiryDate() {var argv = isExpiryDate.arguments;var argc = isExpiryDate.arguments.length;year = argc > 0 ? argv[0] : this.year;month = argc > 1 ? argv[1] : this.month;if (!isNum(year+""))return false;if (!isNum(month+""))return false;today = new Date();expiry = new Date(year, month);if (today.getTime() > expiry.getTime())return false;elsereturn true;}/*************************************************************************\boolean isNum(String argvalue)return true if argvalue contains only numeric characters,else return false.\*************************************************************************/function isNum(argvalue) {argvalue = argvalue.toString();if (argvalue.length == 0)return false;for (var n = 0; n < argvalue.length; n++)if (argvalue.substring(n, n+1) < "0" || argvalue.substring(n, n+1) > "9")return false;return true;}/*************************************************************************\boolean luhnCheck([String CardNumber])return true if CardNumber pass the luhn check else return false.Reference: http://www.ling.nwu.edu/~sburke/pub/luhn_lib.pl\*************************************************************************/function luhnCheck() {var argv = luhnCheck.arguments;var argc = luhnCheck.arguments.length;var CardNumber = argc > 0 ? argv[0] : this.cardnumber;if (! isNum(CardNumber)) {return false; }var no_digit = CardNumber.length;var oddoeven = no_digit & 1;var sum = 0;for (var count = 0; count < no_digit; count++) {var digit = parseInt(CardNumber.charAt(count));if (!((count & 1) ^ oddoeven)) {digit *= 2;if (digit > 9)digit -= 9;}sum += digit;}if (sum % 10 == 0)return true;elsereturn false;}/*************************************************************************\ArrayObject makeArray(int size)return the array object in the size specified.\*************************************************************************/function makeArray(size) {this.size = size;return this;}/*************************************************************************\CardType setCardNumber(cardnumber)return the CardType object.\*************************************************************************/function setCardNumber(cardnumber) {this.cardnumber = cardnumber;return this;}/*************************************************************************\CardType setCardType(cardtype)return the CardType object.\*************************************************************************/function setCardType(cardtype) {this.cardtype = cardtype;return this;}/*************************************************************************\CardType setExpiryDate(year, month)return the CardType object.\*************************************************************************/function setExpiryDate(year, month) {this.year = year;this.month = month;return this;}/*************************************************************************\CardType setLen(len)return the CardType object.\*************************************************************************/function setLen(len) {// Create the len array.if (len.length == 0 || len == null)len = "13,14,15,16,19";var tmplen = len;n = 1;while (tmplen.indexOf(",") != -1) {tmplen = tmplen.substring(tmplen.indexOf(",") + 1, tmplen.length);n++;}this.len = new makeArray(n);n = 0;while (len.indexOf(",") != -1) {var tmpstr = len.substring(0, len.indexOf(","));this.len[n] = tmpstr;len = len.substring(len.indexOf(",") + 1, len.length);n++;}this.len[n] = len;return this;}/*************************************************************************\CardType setRules()return the CardType object.\*************************************************************************/function setRules(rules) {// Create the rules array.if (rules.length == 0 || rules == null)rules = "0,1,2,3,4,5,6,7,8,9"; var tmprules = rules;n = 1;while (tmprules.indexOf(",") != -1) {tmprules = tmprules.substring(tmprules.indexOf(",") + 1, tmprules.length);n++;}this.rules = new makeArray(n);n = 0;while (rules.indexOf(",") != -1) {var tmpstr = rules.substring(0, rules.indexOf(","));this.rules[n] = tmpstr;rules = rules.substring(rules.indexOf(",") + 1, rules.length);n++;}this.rules[n] = rules;return this;}// End --></script><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com--><form name="ThisForm">Card Number: <input name="CardNumber" size="16" maxlength="19"><br>Card Type:<select name="CardType"><option value="MasterCard">MasterCard<option value="VisaCard">Visa<option value="AmExCard">American Express<option value="DinersClubCard">Diners Club<option value="DiscoverCard">Discover<option value="enRouteCard">enRoute<option value="JCBCard">JCB</select><br>Expiration Date: Month<select name="ExpMon"><option value="1" selected>1<option value="2">2<option value="3">3<option value="4">4<option value="5">5<option value="6">6<option value="7">7<option value="8">8<option value="9">9<option value="10">10<option value="11">11<option value="12">12</select>Year <input name="ExpYear" size="2" maxlength="2">(Range: 1997~2020)<br><input type="button" value="Check" OnClick="CheckCardNumber(this.form)"><br></form><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com-->