HELP programming "tic-tac-toe" with <canvas><canvas/>

Hi everyone, is this a right place to get help with javascript code? ?I’m a student from Lithuania and i need to make an artificial intelligence program. I selected a game [I]“tic-tac-toe”[/I]. I made it in a very simple way, game against friend, but professor doesn’t like it, she says that user should be able to play against pc. Problem is that i am not a programmer, and my javascript programming skills is very low.? I’m joined here to get any help from JS masters?
Folder of my files is attached below.
[URL=”http://dl.dropbox.com/u/22220298/tic-tac-toe.zip”]tic-tac-toe.zip[/URL]
Just extract a folder and run index.html to view it in browser. Code to play against opponent is in file “[I]code1.js[/I]” code to play against pc should be in file “[I]code2.js[/I]“.

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