Javascript Mandelbrot plotter - part 2

I've made a few tweaks to my javascript mandelbrot drawing code, so there's a new version uploaded here. You can now select three different colours and a palette will be interpolated made up from in-between colours.

So, here's an example that I came up with using the new version:

There's a couple more simple options in this version, like a choice of fractal sizes and a reset button. It would be handy to have an 'undo' option for those times when you've made a slip of the mouse...

So, don't be surprised if there are more changes to come.