JavaScript Code function cardnumber(inputtxt)Īlert("Not a valid Amercican Express credit card number!") įollowing example validate a Visa card starting with 4, length 13 or 16 digits. It offers 3 tools a single credit card generator, a bulk generating tool, and a validator. The CardGuru service is our overall best credit card generator and validator. CardGuru Overall Best Credit Card Generator & Validator. Input Credit Card No.[Starting with 34 or 37, length 15 digits (American Express) and Submit In this article, I will discuss the top 10 credit card generators and validators out there. JavaScript form validation - checking non-empty We have kept the CSS code part common for all the validations.įollowing example validate a American Express credit card starting with 34 or 37, length 15 digits. JCB :- Starting with 2131 or 1800, length 15 digits or starting with 35, length 16 digits.įollowing code blocks contain actual codes for the said credit cards validations.Diners Club :- Starting with 300 through 305, 36, or 38, length 14 digits.Discover :- Starting with 6011, length 16 digits or starting with 5, length 15 digits. MasterCard :- Starting with 51 through 55, length 16 digits.Visa :- Starting with 4, length 13 or 16 digits.American Express :- Starting with 34 or 37, length 15 digits.Here are some format of some well-known credit cards. You can easily change a format with simply modify the regular expression which we have used for various cards. We are not sure that all the formats which we have discussed here are correct because time to time a company can change their numbering format. But there is no common format in the credit card numbering system, it varies company to company. There are various companies in financial market offer credit cards. In this page, we have discussed how to validate a credit card number (in a different format) using JavaScript. A validating credit card is an important point while receiving payment through an HTML form.
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