package com.mycustom.components { import mx.controls.TextInput; import mx.events.ValidationResultEvent; import mx.validators.EmailValidator; import flash.events.Event; import mx.validators.ValidationResult; public class TextInputEmail extends TextInput { private var emailValidator:EmailValidator = new EmailValidator(); private var validator:ValidationResultEvent; public function TextInputEmail() { super(); this.emailValidator.source = this; this.emailValidator.property = "text"; this.addEventListener("enter", this.validate); } private function validate(event:Event):void { validator = emailValidator.validate(); if (validator.type == ValidationResultEvent.VALID) { this.errorString = ""; } else { this.errorString = validator.message; } } } }