I am looking for a javascript framework which is stable first of all and supports many things like I say, i could drag and drop, sliders, do some event based effects, AJax. I think facebook got some functionalities that i am looking but am not able to make out which is the JS framework they are using. Any idea?

I would highly appreciate to receive your consideration and patience in letting me know the many available javascript frameworks available that i could do R&D and settle with one, esoecially that facebook one, I guess.

Thanks in advance for the consideration, I remain

With regards,

Hari