Hide / Show admin bar with button

Hello,
I was wondering if someone could point me in the right direction. Branda does a great job of hiding away the admin bar and thats mostly how I like it. I use WP Swift Control Pro to add a mini user menu to the front end that floats, and it provides easy access to most functions. Clients love it. But recently, I’ve come across a few reasons that they or I might need something thats on the Admin bar. How could I go about adding a function to Show/Hide the admin bar via a button?