I would like to introduce you a new plugin I've made for Axure... A simple but useful Axure plugin with big set of CSS animations for your projects. You can add many new animations for your OnClick, OnMouseEnter, OnPageLoad, etc. interactions that are not available in Axure for now.
It's very easy to install, very simple to use and...
It's ABSOLUTELY FREE
Demo is here
Instruction is here
ZIP-file with plugin is here
Enjoy it & build awesome prototypes!
P.S. I've tried to make it simple to use for even Axure beginners.
P.P.S. I know that using pure JS is the much more easy way to do the same, but I wanted to do it with maximum Axure built-in functions, because... Look at P.S. above