JavaScript recursion: Maximum call stack size exceeded

Question

I have a recursive function for moving some circles on a canvas. Overed circle is enlarged (zoom in) and all the other circles is pushed away. Pushed circles push other circles

Answer 1

1) I can not implement iteration because of unknown count of operations needed;

Well, I have not looked at your code, but a general avoidance of linear recursion (you have a linear one here) looks like this:

while (1 == 1) {
    if (breakcondition)
        break;
    doSomeCode()
}

So you do not have to know the exact number of iterations like in the for- loop case.