package com.senocular.display {                import flash.display.DisplayObject;        import flash.geom.Rectangle;                /**       * duplicateDisplayObject       * creates a duplicate of the DisplayObject passed.       * similar to duplicateMovieClip in AVM1       * @param target the display object to duplicate       * @param autoAdd if true, adds the duplicate to the display list       * in which target was located       * @return a duplicate instance of target       */        public function duplicateDisplayObject(target:DisplayObject, autoAdd:Boolean = false):DisplayObject {            // create duplicate (constructor in quotes to bypass strict mode)             var targetClass:Class = target["constructor"];          //或者 var targetClass:Class = Object(target).constructor;  package com.senocular.display {        import flash.display.DisplayObject;    import flash.geom.Rectangle;        /**     * duplicateDisplayObject     * creates a duplicate of the DisplayObject passed.     * similar to duplicateMovieClip in AVM1     * @param target the display object to duplicate     * @param autoAdd if true, adds the duplicate to the display list     * in which target was located     * @return a duplicate instance of target     */    public function duplicateDisplayObject(target:DisplayObject, autoAdd:Boolean = false):DisplayObject {        // create duplicate (constructor in quotes to bypass strict mode)        var targetClass:Class = target["constructor"];        //或者 var targetClass:Class = Object(target).constructor;         //以上两种写法均返回一份类定义对象的引用，我们可以直接通过这个引用来创建类的实例，如下：            var duplicate:DisplayObject = new targetClass();          // duplicate properties             duplicate.transform = target.transform;            duplicate.filters = target.filters;            duplicate.cacheAsBitmap = target.cacheAsBitmap;            duplicate.opaqueBackground = target.opaqueBackground;            if (target.scale9Grid) {                var rect:Rectangle = target.scale9Grid;                // Flash 9 bug where returned scale9Grid is 20x larger than assigned                 rect.x /= 20, rect.y /= 20, rect.width /= 20, rect.height /= 20;                duplicate.scale9Grid = rect;            }                        // add to target parent's display list             // if autoAdd was provided as true             if (autoAdd && target.parent) {                target.parent.addChild(duplicate);            }            return duplicate;        }    }

import com.senocular.display.duplicateDisplayObject;// create duplicate and assign to newInstance variable// using true for autoAdd automatically adds the newInstance// into the display list where myOldSprite is locatedvar newInstance:Sprite = duplicateDisplayObject(myOldSprite, true);newInstance.x += 100; // shift to see duplicate