adding fading effect in facebook fanpage

I was wondering how this (http://www.facebook.com/Sennheiser) was done in facebook fanpage? It has a fading slider/gallery. Any good links or开发者_运维百科 tutorials that talks about this?

Thanks!

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Facebook provides FBJS animation library. Sennheiser is most likely implemented with that. However since application tabs now support iframes you can just use normal HTML and any JavaScript library you wish. jQuery is popular option.