on press, counting +1 etc script that counts+1

[Guest]

eh.
well, i think it is a bit wrong written..

i am trying to write a script for my webcam, so that a user when he pressed
the LEFT button a counter starts running from a specified number (127)
everytime ,as he still holds the button a counter is timing or every time -1
or +1 ,till a maximum or minimum numbers, but...

the script must also runs a javascript that also moves the camera to the
specified place.

Is this possible??

Thnxs,
i know it is maybe a hard question..