Action at page transition

Hi Prosper people,

Is it possible to automatically execute an external script at a page 
transition? That is, when a page transition is done, the script is 
executed (without any special mouse action).

I would like to start and end animations when I enter/exit a page. I 
have figured out how to do this with mouse clickings, by doing something 
like:

\href{run:start_animation.sh}{Animation}

An even better solution wouyld be that this script, and a correspopnding 
one to stop the animation, would be executed when the page is opened/closed.

Any solution to this?

Thanks for any help,

Patrick Eriksson


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