Accordian AS explanation

[Buraaq]

Hey all!

I downloaded this .fla file off the net which is basically an accordian with some nifty AS.

I wanted to know how the AS exactly worked. I get some part of it, but mostly it goes over my head. I modified AS and the movieclips in the file for my use, and its mainly done now. But I still want to understand the logic behind the whole script!

I am not good at all when it comes to scripting. I can only use some very basic actions like gotoandstop and loadmovie etc effectively. But I want to really know how it works, and would really appreciate if someone could break this "code" down for me. Exactly what the AS tells Flash to do in each line. Would really appreciate it! Its Flash CS4 file, you can download it and view it too =) I am attaching the AS2 below as well. Thanks a lot!!

stop();
speed = 10;
initial_width = 75;
target_width = 450;
sp = rect1._x;
this.createEmptyMovieClip("emptymc", 0);
emptymc.onEnterFrame = function() {
for (i=1; i<=6; i++) {
if (_root.hit.hitTest(_root._xmouse, _root._ymouse, true)) {
if (_root["rect"+i].hitTest(_root._xmouse, _root._ymouse, true)) {
new_x = (_root.sp-(75*(i-1)))-rect1._x;
rect1._x += new_x/speed;
n_width = target_width-_root["rect"+i]._width;
_root["rect"+i]._width += n_width/speed;
} else {
n_width2 = initial_width-_root["rect"+i]._width;
_root["rect"+i]._width += n_width2/speed;
}
} else {
new_x = _root.sp-rect1._x;
rect1._x += new_x/(speed+50);
n_width2 = initial_width-_root["rect"+i]._width;
_root["rect"+i]._width += n_width2/(speed-1);
}
_root["rect"+(i+1)]._x = _root["rect"+i]._x+_root["rect"+i]._width;
_root["movie"+i]._x = _root["rect"+i]._x-1;
}
};