I asked a partial question on stackoverflow, and then realized that this would be the place to get a better answer because this is the game dev website, and you all may know more than the programmers over at stackoverflow about this subject.
So my question is: for making an online multiplayer game that runs in the browser, what would be more efficient to use? flash, javascript, html5, or anything else? Also take into consideration that whatever language is used will be using PHP to access databases and such.
Edit
Efficient as in up to date: what is used today by most people, what should be used by a group of people who aren't that experienced in programming (AKA easy, well documented) this isn't really a yes or no question, more of an opinionated answer. Some people hate flash but others love it, I'm unsure of what I should use for a Browser MMO RTS and would like your opinions on it.
Just to clear this up to people who don't know: an MMO RTS usually means its a game with not too much movement, but nifty animations when you scroll over pictures. Also has pretty nice art (dealing with pixel art or whatever will be an issue...).
Also, should I use Javascript+Flash? Say most of the game was written in javascript, but certain fight animations or something were written in flash... is this plausible? Or should it be entirely done with a certain language (the visual aspect).