Metronom with no keypad, am I S O L, Basically?

[Christopher-Mark Gilland]

So, I have a macbook.  NO extra keyboard, none I can unplug, no bluetooth 
with num pad, etc.  All I got's the macbook keyboard with no num pad.  Is 
there a way, thus, being I can't do num pad 7, that I can turn on and off 
the metronom?  I desperetly need it for this project as there is a cold 
silence for one measure followed by me coming back in right instantly with 
the backup, so if I time this wrong, it's gonna sound god aweful!

Chris.