Charlotte, welcome to the forums!
Assuming you used the Page shelf to create the animation, the answer at the moment is: Not currently. But hope does spring eternal!
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The idea Automatic animation of page on Public/Server is marked BETA and therefore assume web animations will be featured in soon released Tableau 10.
If this isn't so, someone better remove the BETA tag from mentioned idea!
But perhaps BETA only means that Tableau is working on this and that if it wasn't ready for Tableau 10, it may be soon thereafter, such as Tableau 10.1 or 11 ?! This last comment is probably all nonsense since BETA means it is in BETA and available for testers.
Thanks Kettan! I never remember what is and is not an open feature change (not covered by my NDA with Tableau). So I always error toward caution.