Recognize the 2 key from the keyboard or from the numpad

I would like to add keyboard short-cuts to my web application.

But for one of them, I need to be able to distinguish between the d开发者_StackOverflow中文版igits entered with the numpad from the one entered above the qwerty chars (my use case is for French keyboards, so it's azerty, but I don't think it's a problem). I'll combine it with a detection of the caps lock activation.

Is that possible?

Keycode detection is pretty chaotic in browsers: Check the quirksmode.org compatibility table.

According to this list, though, surprisingly to me, it seems in fact to be possible to distinguish the two:

Key      Code
------------------------------
2        50  
numpad 2 98

Haven't tried this but it's definitely worth a try.

Read up on keyCode and the onkeyup event.

document.onkeyup = alertKeyPressed;       

function alertKeyPressed(){
     var keyPressed = event.keyCode;
     alert(keyPressed);
}