bootstrapvalidator/src/js/validator/emailAddress.js

(function($) {
    $.extend($.bootstrapValidator.validator, {
        emailAddress: {
            /**
             * Return true if and only if the input value is a valid email address
             *
             * @param {bootstrapValidator} validateInstance Validate plugin instance
             * @param {HTMLElement} element
             * @param {Object} options
             * @returns {boolean}
             */
            validate: function(validateInstance, element, options) {
                var value       = $.trim($(element).val()),
                    // Email address regular expression
                    // http://stackoverflow.com/questions/46155/validate-email-address-in-javascript
                    emailRegExp = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
                return emailRegExp.test(value);
            }
        }
    });
}(window.jQuery));