Simple Navigation Bar - Making Individual Buttons?

I started creating a simple navigation bar: [URL]
But decided to make individual buttons: [URL]

As you can see the latter repeats, however the code (after about an hour checking it seems to be identical:
Actions for frame one:
_root.buy_mc.onEnterFrame = function() {
if (mouse_over_buy_mc) {
_root.buy_mc.nextFrame();
} else {
_root.buy_mc.prevFrame();
}};

Actions for invisible button:
on (rollOver) {
_root.mouse_over_buy_mc = true;
} on (rollOut) {
_root.mouse_over_buy_mc = fstartlse;
}on (release){
getURL("[URL]");
}