Keyboard in Javascript (my hard work)

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At the start of my bachlours in computer science I was very keen to learn javascript, I had once made a complete keyboard in java script visit the link and tell me howz that, there is a bug in it so tell me u found it or not, its my hard work, the hard coding in techincal language, plz tell me how good or bad it is, I am waiting for your comments, here is the link: http://www.geocities.com/antilog.html