The forms in the storefront application use jQuery validation to provide JavaScript based validation which doesn't require a screen refresh.

The internationalized validation error messages are retrieved from the message catalog and are defined in MainLayout.jsp . The message keys are all prefixed with jquery.validator .

The validation criteria for the form fields are found within the JavaScript file called kk.validation.js . After installation, this file may be found in the KonaKart\webapps\konakart\script directory.