Here a nice site with multiplay javascript based games

http://www.javascriptgaming.com/

you can also naturally have a look at the sourcecodes of the game

Some small recent games of mine:
Griefer 4k http://damocles11.byethost9.com/griefer4k.html
Kobold 4k http://damocles11.byethost9.com/kobold.html
Cave 4k http://damocles11.byethost9.com/cave4k.html