Flapjax: New language based on javascript

Flapjax is a new programming language designed around the demands of modern, client-based Web applications. Its principal features include: optional templating syntax; event-driven, reactive evaluation; persistent data saved on a data store we provide; convenient data sharing; access-control for shared data; interfaces to external Web services.
With this programming language (or some like library) you can easy code next fitures: static fields with validation; dynamic reaction for user's actions; some dynamic futures (timers, mouse's partner, etc); many others.

Easy start you can find on www.flapjax-lang.org