stop moving when mouse is outside certain area (parallax scroller)

[onine]

Hi everyone.
I have a problem with a "paralax scroller" movie clip. I downloaded the original from this site and I'm currently modifying it. Currently I'm loading it into the .swf as another .swf like this:

loadMovie("parallax_01.swf", parallax_mc);

which is fine.

My problem is that it continues to scroll even when the mouse isn't over it. Please check it out here to see what I mean. As you can see, it works perfectly, as long as the mouse remains within the bounds of the loaded .swf, but once outside those bounds - ie outside the box - it continues to scroll (which is bad).

Can anyone help me modify my code so that this can be fixed? I guess its something about checking where the mouse is? getBounds maybe? The code governing the movement is inside the loaded "parallax_01.swf" and reads as follows:
(foreground layer)

onClipEvent (enterFrame) {
	if (_root.parallax_mc.mainVar == 0) {
		homeX = (-_root.parallax_mc._xmouse*3)+540;
	} else {
		homeX = (-_root.parallax_mc.mainVar*3)+540;
	}
	thisX = _x;
	diffX = homeX-thisX;
	if (_root.parallax_mc.mainVar == 0) {
		moveX = diffX/30;
	} else {
		moveX = diffX/5;
	}
	_x = thisX+moveX;
}

(middleground layer)

onClipEvent (enterFrame) {
	if (_root.parallax_mc.mainVar == 0) {
		homeX = (-_root.parallax_mc._xmouse*2)+405;
	} else {
		homeX = (-_root.parallax_mc.mainVar*2)+405;
	}
	thisX = _x;
	diffX = homeX-thisX;
	if (_root.parallax_mc.mainVar == 0) {
		moveX = diffX/30;
	} else {
		moveX = diffX/5;
	}
	_x = thisX+moveX;
}

(background layer)

onClipEvent (enterFrame) {
	if (_root.parallax_mc.mainVar == 0) {
		homeX = (-_root.parallax_mc._xmouse)+270;
	} else {
		homeX = (-_root.parallax_mc.mainVar)+270;
	}
	thisX = _x;
	diffX = homeX-thisX;
	if (_root.parallax_mc.mainVar == 0) {
		moveX = diffX/30;
	} else {
		moveX = diffX/5;
	}
	_x = thisX+moveX;
}

I'm sure its fairly simple but I just can't figure it out. Thank you for looking I really appreciate it.

[blazes816]

Can't you just use an onRollout? just make it stop?

[onine]

I dunno - can I?
I'm still a newb really and this is someone else's code. So where do I put the onRollout code and what should it say? Thanks!

[onine]

Hey, thanks blazes. Got it working like this:
created an invisible button underneath with this code:

on (rollOver) {
	posRight = "yes";
}
on (rollOut) {
	posRight = "no";
}

then altered the layer code like this:

onClipEvent (enterFrame) {
	if (_parent._parent.posRight == "yes"){
		if (_root.parallax_mc.mainVar == 0) {
			homeX = (-_root.parallax_mc._xmouse*3)+540;
		} else {
			homeX = (-_root.parallax_mc.mainVar*3)+540;
		}
		thisX = _x;
		diffX = homeX-thisX;
		if (_root.parallax_mc.mainVar == 0) {
			moveX = diffX/30;
		} else {
			moveX = diffX/5;
		}
		_x = thisX+moveX;
	}
}

probably pretty messy code but hell, it works. Thanks for the suggestion - it worked a treat