import flash.ui.Keyboard;
import flash.events.KeyboardEvent;
import flash.events.FocusEvent;

inputText.addEventListener(FocusEvent.FOCUS_IN,textInputHandler);
inputText.addEventListener(FocusEvent.FOCUS_OUT,textInputHandlerOut);

function textInputHandler (event:FocusEvent):void {
    stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
    output_txt.text = "Behold!";
}

function textInputHandlerOut (event:FocusEvent):void {
    stage.removeEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
    output_txt.text = "Silence!";
}

function keyDownHandler (event:KeyboardEvent):void {
        if( event.charCode == 13 ){
      checkInput();
    }
}


function keyHit(evt:KeyboardEvent):void {
   trace("key pressed " +evt.keyCode);
   if (evt.keyCode == 13) {
               trace ("Okidoki");
   }
}

function checkInput () {
        output_txt.text = "Pressed Enter";
        trace("Pressed Enter");
}