Necesito ayuda con las coordenadas XY

stop();

//import some transition stuff
import mx.transitions.Tween;
import mx.transitions.easing.*;

var coor:Array = new Array([357.6,19.9],[21.7,9.7],[367.9,287.9],[34.2,287.9]);
var len:Number = coor.length;

var orix:Number = mc._x;
var oriy:Number = mc._y;
var oriw:Number = mc._width;
var orih:Number = mc._height;
var orixscale:Number = mc._xscale;
var oriyscale:Number = mc._yscale;
var tw:Number;
var th:Number;

var currX:Number;
var currY:Number;
var currXscale:Number;
var currYscale:Number;
var currW:Number;
var currH:Number;

var onScale:Boolean = false;

var holder:MovieClip = this.createEmptyMovieClip("holder",this.getNextHighestDepth());

function buildMenu():Void{
    for (var j=0; j<len; j++) {
        var btn = holder.attachMovie("btn", "btn"+j,holder.getNextHighestDepth());
        btn.jvar = j;
        btn._x = 450;
        btn._y = 50+btn._height*j;
        btn.labelbtn.text = j;
        btn.onPress = slideMe;
    }
}

buildMenu();

function slideMe():Void{
    if(currX == undefined && currY == undefined){
        easing(mc,orix,coor[this.jvar][0],oriy,coor[this.jvar][1]);
    }else{
        easing(mc,currX ,coor[this.jvar][0],currY,coor[this.jvar][1]);
    }
}

function easing(mc:MovieClip, startx:Number, endx:Number, starty:Number, endy:Number):Void {
    var time:Number = 35;
    var easeType:Function = Strong.easeOut;
    var tweenListener:Object = new Object();
    trace(onScale);
    if (onScale == false){
        var xTween:Tween = new Tween(mc, "_x", easeType, startx, endx, time);
        var yTween:Tween = new Tween(mc, "_y", easeType, starty, endy, time);
        currX = endx;
        currY = endy;
    } else{
        [COLOR="Red"]////////calculate new coordinates after zooming////////////////////
        // I try calculate here..still got no luck ....
        endx = endx - tw/2;
                endy = endy - th/2;

        //////////////////////////////////////////////////////////////////[/COLOR]
        var xTween:Tween = new Tween(mc, "_x", easeType, startx, endx, time);
        var yTween:Tween = new Tween(mc, "_y", easeType, starty, endy, time);
        currX = endx;
        currY = end
    }
}
///////rescale mc thingy stuff

var zoomPercent:Array = ["100","120","140","160","180"];
var zoomlen:Number = zoomPercent.length;
var count:Number = 0;
var clickable:Number = 0;

zoomout.enabled = false;

zoomin.onPress = function(){
    clickable++;
    onScale = true;
    zoomout.enabled = true;
    if(count<zoomlen){
        count++;
        zoomInto(zoomPercent[count]);
        if(clickable == 4){
            zoomin.enabled = false;
        }
    }
};

zoomout.onPress = function() {
clickable--;
trace(clickable);
zoomin.enabled = true;
if(count>0){
     count--;
     zoomInto(zoomPercent[count]);
     if(clickable == 0){
        zoomout.enabled =false;
        onScale = false;
     }
}
};

function zoomInto(zoom,duration){
//determine the 100% width & height
    var ow = mc._width/(mc._xscale/100);//original width
    var oh = mc._height/(mc._yscale/100);//original height
    tw = ow*(zoom/100);//target width
    th = oh*(zoom/100);//target height
    //trace(tw+"||"+th);
    var mcwidth:Object = new Tween(mc, "_width", Zoom.easeIn, mc._width, tw, 1, true);
    var mcheight:Object = new Tween(mc, "_height", Zoom.easeIn, mc._height, th, 1, true);
}