How to change a clip's height without affecting the width?

1

Hello everybody!

There is movie clip “iGun” on the stage, when I change the clip’s height, the width becomes automatically scaled ( I don’t know why)
simple sample :

            iGun.height = mouseScale * iGunH / 100;

Full code:


    public class Untitled extends MovieClip {
                
        public function Untitled():void { 
            stage.addEventListener(MouseEvent.MOUSE_MOVE, m_mouseMove);
        }
        
        function m_mouseMove(event:MouseEvent):void {
            var mouseAngle = Math.atan2(stage.mouseY - iGun.y,
                    stage.mouseX - iGun.x) * 180 / Math.PI + 270/Math.PI;
            iGun.rotation = mouseAngle;

            var iGunH:int = 200;
            var iGunW:int = 50;
            var mouseScale:int = (360 - mouseY) * 100 / 360;
**            iGun.height = mouseScale * iGunH / 100;**

        }

The demo:
http://www.encaps.net/software/flash/Untitled.swf

The question: how to change the clip’s height, without affecting the width?