"anti-spyware keypad" any use for internet security? I.e., keystroke monitors?

Hello all,

I don't know much about spyware etc., but a friend told me he avoids typing any passwords at public computers because of "keystroke monitors." I found this very inconvenient!

So it occurred to me that "probably" a keystroke monitor will not read what is happening in a simple javascript keypad?

So with the help of some web designers, I just made one and posted it at http://anti-spyware-keypad.com

Please tell me if this is any good or not? If it doesn't work, then of course I'll have to give up the idea. Thank you.