[Javascript] Keyboard navigation

[Paul Cowan]

Hi,

I need to implement a way of allowing a user to be able to pull down menu 
options from my pages by using keypresses.  Ideally I want to simulate the 
behouir that happens in windows e.g. whenever I press alt and the 'f' key, 
the file menu drops down.  Then whenever I press the down key, I can scroll 
up and down the menu options.

Is this possible using javascript?  Or how on earth can I do this??

Thanks

Paul