bootstrapvalidator/src/js/validator/siren.js

The best jQuery plugin to validate form fields. Designed to use with Bootstrap 3

(function($) {
    $.fn.bootstrapValidator.i18n.siren = $.extend($.fn.bootstrapValidator.i18n.siren || {}, {
        'default': 'Please enter a valid SIREN number'
    });

	$.fn.bootstrapValidator.validators.siren = {
		/**
		 * Check if a string is a siren number
		 *
		 * @param {BootstrapValidator} validator The validator plugin instance
		 * @param {jQuery} $field Field element
		 * @param {Object} options Consist of key:
         * - message: The invalid message
		 * @returns {Boolean}
		 */
		validate: function(validator, $field, options) {
			var value = $field.val();
			if (value === '') {
				return true;
			}

            if (!/^\d{9}$/.test(value)) {
                return false;
            }
            return $.fn.bootstrapValidator.helpers.luhn(value);
		}
	};
}(window.jQuery));