sethour.addEventListener(TextEvent.TEXT_INPUT,onTextInput);
   sethour.addEventListener(FocusEvent.FOCUS_IN,onFocusInHour);
   sethour.addEventListener(FocusEvent.FOCUS_OUT,onFocusOutHour);
 

 private function onTextInput(evt:TextEvent) {
   var pattern:RegExp=/[0-9]/;
   if (!pattern.test(evt.text)) {
    evt.preventDefault();
   }
  }