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Very appreciated for any reply.
Before you go out buying a book check out some tutorials on the web. I find this site very useful.
www.w3schools.com
I'd suggest looking around a bit: you may find that (inexpensive?) software that does (most of) what you want already exists!
Some browsers such as IE might have features that let you intercept keystrokes such as F12 but it is unlikely that you could find a way to use such keys reliably. It would also necessitate the use of javascript which should be reserved for features rather than core website functions.
Kaled.