Expression for Animation length?

Is there a way to get the length of an animation to use in the expression editor? It doesn't appear so in the normal object, but maybe in an extension? If not, this would be very helpful. :)

EDIT: Sorry, I just saw there was already a feature request for this in Bug Tracker. Thanks Sphax!

Another solution would be to just set the frame number to like 999 and then in the immediate row after getting the current frame by Img("Object"), I think this should give you the last one as well!

Thanks for the suggestions. I wanted to use a Random(max frames) expression to choose one frame out of an animation (the animation is a pool of random floor tiles). But since that pool will be ever expanding over time, I wanted a single solution so I wasn't having to go back and adjust the code every time I add new frames.

Thanks for the ideas. Hopefully the feature request will yield some simpler solutions. :)