How can i synch my keyboard with virtual keyboard?

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Javascript

Hi,

I am exploring the virtual keyboard,i need to synchronize my virtual keyboard with my tangible keyboard so when click key on keyboard, clicked key's corresponding virtual keyboard's key must be hit and should make entry in textbox/textarea.

I have some idea:
1)There must be some js in which we must do some mapping(between virtual keyboard key and tangible keyboard) so when i hit key on keyboard corresponding virtual keyboard key must be picked.

Please suggest how can i implement this

Thanks,
Sumit