Can I change my petwindow midgame?

[cybersmurf]

I was wondering if its at all possible to have a pet-window that changes depending on which pet I summon?
Something like:

If summoned=airpet then
button1-function=shadowstep;attack;
else if summoned=earthpet then
button1-function=attack;

I know how to assing a button multiple functionality, its just the if/else part I'm unsure about.

Is there a workaround like doing a /load_ui airpetwindow, /load_ui firepetwindow etc.. before casting the pet?

Just found out some UIs use Class Detection Triggers, could this be used for pets and if so - how?

Thanks in advance
Flaxer
Befallen