Help for interaction in text insert field

The script updates a value called inputBoxValue as the user types. To do something when a specific value ha sbeen typed, just create one or more triggers to watch that variable for changes. For example, if your target code is A1234, create triggers similar to this:

Do something   (like open a layer)
    When inputBoxValue changes
        if inputBoxValue = value A1   (or A12 or A123, etc.)
            Else do something else   (if needed)

If you are just showing layers or opening a lightbox, then you can continue to return to this same text input box. If you need to navigate away from this slide and resume checking on another different slide, then yes you would need to include the script trigger that fires when the user clicks the text entry. Just include whatever trigger matches you need for inputBoxValue on that new slide.