There are four mandelbulb functions: powers 2, 3, 5, and 9. To switch to that function, press the number of that power on your keyboard.
Found a TON of errors and bad programming habits... so I remodeled to make it cleaner and much better. Now I just need to make an interface... A, B, C, and D are constants for the quintic mandelbulb Credits: http://en.wikipedia.org/wiki/Mandelbulb