Shiny Knob Control with jQuery add button control

[perhapscwk]

http://tutorialzine.co m/2011/11/pretty-switches-css3-jquery/

regarding above tutorial "Shiny Knob Control with jQuery and CSS3".

I would like to add 3 button so beside to use mouse to scroll the knob, i can just click that 3 button to let it scroll to a degree which i want.

such as mute(0 degree), mid(180 degree) and max(360 degree).

Please help.

thanks.

[perhapscwk]

anyone can help?

thank you very much.