是否可以使用JavaScript从Flash applet拖放到外部？

import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.external.ExternalInterface;

var dragSprite:Sprite = new Sprite();
dragSprite.graphics.beginFill(0xFF0000);
dragSprite.graphics.drawRect(0, 0, 50, 50);
dragSprite.graphics.endFill();
addChild(dragSprite);

dragSprite.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);

function onMouseDown(event:MouseEvent):void {
    dragSprite.startDrag();
    stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp);
}

function onMouseUp(event:MouseEvent):void {
    dragSprite.stopDrag();
    stage.removeEventListener(MouseEvent.MOUSE_UP, onMouseUp);
    ExternalInterface.call("onDrop", dragSprite.x, dragSprite.y);
}

ExternalInterface.addCallback("getPosition", getPosition);

function getPosition():String {
    return dragSprite.x + "," + dragSprite.y;
}

var swf = document.getElementById("mySwf");

swf.onDrop = function(x, y) {
    alert("拖放到外部，坐标：" + x + "," + y);
};

swf.getPosition = function() {
    return swf.x + "," + swf.y;
};