2D MMO HTML5 JS

[captincookie]

Hello I am a newbie and I want to make a 2D mmo Browser game using JS and HTML5 but I don't know what engine to start off with.The game I'm making isn't a one world rpg. Its a tile based multi-map world. As in once you finish a map go back to the lobby, similar to chess.Find a game, Join, reset. So if you stumble on an engine please contact me.