package 
{
  import mx.controls.TextInput;  
  import mx.events.ValidationResultEvent;
  import mx.validators.EmailValidator;
  import flash.events.Event;

  public class professional_flex_code_13_EmailTextInput extends TextInput {
   
    private var emailValidator:EmailValidator = new EmailValidator();
    private var validator:ValidationResultEvent;
    
    public function professional_flex_code_13_EmailTextInput(){
      super();    
      this.addEventListener("change", this.validate);
      this.emailValidator.source = this;
      this.emailValidator.property = "text";
    }
    
    private function validate(event:Event):void{
      validator = emailValidator.validate();
      if (validator.type==ValidationResultEvent.VALID)                 {
        this.errorString="";
      } else {
        this.errorString = validator.message;
      }
    }
  }
}