I'm not sure why this version is linked..
It's not finished, I was adding some more functionality, but ran out of time..
In event 10 I set the instance variable SpriteUiD of the text-object "notavailable" to the unique ID of the associated background..
In event 7 I want to perform actions on the background associated with the instance of "notavailable", I have to pick the background and do that by checking if its UID is the same as the instance variable of the texobject..
Like I was saying, this example was not finished completely, althpugh it does most of what you asked for and more..