public static function fixTextInput(event:KeyboardEvent) : void {
  if ((event.charCode == 13) && (event.keyCode == 52)) {
    event.preventDefault();
    var control:TextInput = TextInput(event.currentTarget);
    if (event.shiftKey) {
      control.text = control.text.substring(0,control.selectionBeginIndex) + "4" + control.text.substring(control.selectionBeginIndex,control.text.length);
    } else {
      control.text = control.text.substring(0,control.selectionBeginIndex) + "č" + control.text.substring(control.selectionBeginIndex,control.text.length);
    }
    control.setSelection(control.selectionBeginIndex + 1, control.selectionBeginIndex + 1);
  }
}