Need to Zoom Movieclip

Hi,

I have a map image inside a movieclip that is located in the first frame of the main timeline. I've been trying to use the code below (created by NTD) to zoom the movieclip, but it zooms the entire movie. I've changed _root to _root.map (map is the movieclip instance name), and I've tried putting the code everywhere. I can get only two results. Either the entire movie zooms or nothing zooms. Can this code be modified to work on a mc?

BTW, what would be almost like Christmas would be for the code below to zoom to each of the three choices. In other words, for the image to get larger on each mouse click and keep the clicked point as the center. But that would just be asking too much. I'd be tickled to death just to get it to apply only to my movieclip.

Thanks a bunch,
Debbie

Code:

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scale = false;
myZoom = function (myDepth) {
        if (myDepth == "deep") {
                myDepth = 4;
        } else if (myDepth == "medium") {
                myDepth = 8;
        } else if (myDepth == "light") {
                // default
                myDepth = 12;
        }
        _root.onMouseDown = function() {
                if (k>0) {
                        return;
                }
                zoom = true;
                dir == 1 ? (dir=-1) : (dir=1);
                if (dir == 1) {
                        pt = {x:_root._xmouse, y:_root._ymouse};
                        scale = true;
                }
                if (dir == -1) {
                        scale = false;
                }
        }
        _root.onMouseUp = function() {
                if (k>0) {
                        return;
                        zoom = false;
                }
                dir == 1 ? (dir=-1) : (dir=1);
                zoom = true;
        }
        _root.onEnterFrame = function() {
                if (!zoom) {
                        return;
                }
                _root._xscale += dir*k*50/myDepth;
                _root._yscale += dir*k*50/myDepth;
                var pt2 = {x:pt.x, y:pt.y};
                _root.localToGlobal(pt2);
                _root._x -= (pt2.x-pt.x);
                _root._y -= (pt2.y-pt.y);
                k++;
                if (k == 8) {
                        zoom = false;
                        k = 0;
                }
        }
}
//Usage
myZoom("medium");

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