Hi,
1. Is it possible to put base64 encoded images as a url attribute?
Currently not, but that's already on my todo list.
2. How can I refer to a certain div element in the krpano DOM tree? I mean, there are a lot of divs, and how to set the class or id or any other attribute so I could refer to the element by CSS/jQuery quickly?
I wouldn't recommend any direct custom modifications of the krpano DOM tree, but the DOM element of the layer and hotspot elements are exposed via the 'sprite' member variable:
http://krpano.com/docu/xml/#layer.sprite
Best regards,
Klaus