1 mic two functions

[Roger A Gonzales <gonz1@xxxxxxxxxxxxx>]

OK all you sound and gear mavens out there.  This might sound like a no duh question to some of you but those are the people I would like to hear from.  :)  

When I play with my band I use two mic set-ups.  One to sing out of and one to play out of.  I have the vocal set up to the board of course, and the harp mic to an A-B switch where I can switch between an AKG D790 and a green bullet.  There are times I would like to play my chromatic out of my vocal mic for some jazz tunes I sing and play on but it is set up for vocal and not chromatic.
Is there some kind of footswitch I can use to quickly go from vocal to harp mic?  How do I do this what kind of switch?  I dunno.  Please advise.

thanks in advance
regards,
Roger Gonzales  aka Gonzo