identical.js

(function($) {
    $.fn.bootstrapValidator.validators.identical = {
        /**
         * Check if input value equals to value of particular one
         *
         * @param {BootstrapValidator} validator The validator plugin instance
         * @param {jQuery} $field Field element
         * @param {Object} options Consists of the following key:
         * - field: The name of field that will be used to compare with current one
         * @returns {Boolean}
         */
        validate: function(validator, $field, options) {
            var value = $field.val();
            if (value == '') {
                return true;
            }

            var compareWith = validator.getFieldElements(options.field);
            if (compareWith == null) {
                return true;
            }

            if (value == compareWith.val()) {
                validator.updateStatus(compareWith, 'identical', validator.STATUS_VALID);
                return true;
            } else {
                return false;
            }
        }
    };
}(window.jQuery));