360 image: trigger or JavaScript to change view angle

You can look at the discussion at 

Interaction with 360 degree images | E-Learning Heroes for some info and potential starting points. 

I have not found an active reference to the 360 Image viewer object in SL. However, with a small story.html file hack you can expose all of it, and more. It is a hassle to maintain through project edits though. Of course, you can also make your own from scratch but then you're largely reinventing the wheel, even if it is a better wheel in the end.