Image Panning - Stopping?

programming flash
1

[LEFT]I built out a Flash file with the help with Kirupa’s image panning script: http://www.kirupa.com/developer/flash8/interactive_image_pan3.htm

Anyhow, everything is working great, but I’ve added some on release nav items that overlay the panning motion. Ideally I’d love to have the overlays, when activated, stop the mouse movement altogether. I checked out some examples via Google, and I think it’s possible, I just have no idea where to start.

Here is my image panning code:

this.onMouseMove = function() {
    constrainedMove(bg_mc,4,90);
};
function constrainedMove(target:MovieClip, speed:Number, dir:Number) {
    var mousePercent:Number = _xmouse/Stage.width;
    var mSpeed:Number;
    if (dir == 1) {
        mSpeed = 1-mousePercent;
    } else {
        mSpeed = mousePercent;
    }
    target.destX = Math.round(-((target._width-Stage.width)*mSpeed-3000));
    target.onEnterFrame = function() {
        if (target._x == target.destX) {
            delete target.onEnterFrame;
        } else if (target._x>target.destX+5) {
            target._x -= Math.ceil((target._x-target.destX)*(speed/400));
        } else if (target._x<target.destX) {
            target._x += Math.ceil((target.destX-target._x)*(speed/400));
        }
    };
}

Any help / insight is really appreciated!
[/LEFT]