Align Center

programming flash
1

Anyone knows how to make bgImage align in the center on resize, instead of top left?

Stage.scaleMode = "noScale";
_global.imgConstantWidth = bgImage._width;
_global.imgConstantHeight = bgImage._height;
// ---------------- Function to Set Movieclip at Top-Left  ----------------
setImage = function(mc){
 
 var originalWidth = 1000;
 var originalHeight = 650;
 var widthGutter = (Stage.width - originalWidth)/2;
 var heightGutter = (Stage.height - originalHeight)/2;
 
 mc._x = -widthGutter;
 mc._y = -heightGutter;
}
// ---------------- Function to Resize/Crop Movieclip to Stage Size  ----------------
resizeImage = function(mc){
 
 var scaleByWidth;
 
 if (Stage.width/Stage.height > _global.imgConstantWidth/_global.imgConstantHeight){
  scaleByWidth = true;
 }else{
  scaleByWidth = false;
 }
 
 if (scaleByWidth){
  mc._height = Stage.width * _global.imgConstantHeight / _global.imgConstantWidth;
  mc._width = Stage.width;
 } else {
  mc._width = Stage.height * _global.imgConstantWidth / _global.imgConstantHeight;
  mc._height = Stage.height;
 }
}
 
// ------------- Set Image on Load -------------
setImage(bgImage);
resizeImage(bgImage);
 
// ------------- Set Image on Resize -------------
sizeListener = new Object();
sizeListener.onResize = function() {
 setImage(bgImage);
 resizeImage(bgImage);
};
Stage.addListener(sizeListener);