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Everyone knows that a credit card number is normally made up of 12-16 numbers.However there are many ways that people type their number into a form, often including spaces or hyphens to break up the number and make it more readable.

Parsley comes with various error messages for its built-in validators.

If the required field is blank, we return the error string to the main function.

You are currently viewing the Javascript How-To section of the Wrox Programmer to Programmer discussions.

It helps you provide your users with feedback on their form submission before sending it to your server.

It saves you bandwidth, server load and it saves time for your users.

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