Scrollable Frames are not supported in EPUB (Fixed Layout) Export 'out-of-the-box' as far as I know, however you can probably create a similar effect using Edge Animate, and place this into your InDesign document.
Of the top of my head only the following are supported for Fixed Layout EPUB export:
- Audio & Video
- InDesign animations as well asEdge Animate placed animations
- Navigation buttons
- Page transitions
I had found this same link on the forum, but not being a programmer myself I was hopping there would be a more straightforward solution!
I am having a book a wrote on ibooks author and published with Apple, now trying to also do in a format that would be compatible with non-Apple users, but I am finding that for simple users like me InDesign is a bit of a nightmare! Apple has a number of plug-and-play powerful widgets in ibooks author and trying to get the same functionality in inDesign and EPUB does not seem to be possible.
but thanks for your help and for replying.
I've moved the question to the InDesign EPUB forum.