[javascript-dev] Re: mouseover zone detection

create an image file in an editor and set the size to the size of your patch window

choose different RGB values for the different regions (a grey scale image also works)

read the file into an image object

use the getpixel method to read the RGB values of the pixels that correspond to the mouse position

use this value to choose between different infos

be careful of different compressions of image formats. Sometimes RGB values are not exactly what they seem 

If you have jitter you can do it without java script using jitter matrix

The main problem is that you must be very careful with the window coordinates, they must always correspond to the image coordinates!!! which means that you must be careful with scroll bars. It is best if the origin of the window is fixed...
On the other hand you can have arbitrary shapes for the regions, you can edit them in any image editor superimposing the patcher window and visually define regions, you can add or delete regions easily,... you can get rid of the ifs and replace them with a switch structure ;)

I hope this helps
george