actionscript-3 - アイテムが元の場所に戻らないようにする方法は?

Question

これはドラッグ アンド ドロップ マッチング ゲームです。私の質問は、間違ってマッチングしたアイテムが元の場所に戻らないようにするにはどうすればよいですか? アイテムは残しておきたい。詳しく教えてください、よろしくお願いします。

right_mc.visible=false; 
wrong_mc.visible=false;
var orig1X:Number=item1_mc.x;  
var orig1Y:Number=item1_mc.y;
var orig2X:Number=item2_mc.x;
var orig2Y:Number=item2_mc.y;
var orig3X:Number=item3_mc.x;
var orig3Y:Number=item3_mc.y; 
item1_mc.addEventListener(MouseEvent.MOUSE_DOWN, dragTheObject);
item1_mc.addEventListener(MouseEvent.MOUSE_UP, item1Release);
item2_mc.addEventListener(MouseEvent.MOUSE_DOWN, dragTheObject);   
item2_mc.addEventListener(MouseEvent.MOUSE_UP, item2Release);   
item3_mc.addEventListener(MouseEvent.MOUSE_DOWN, dragTheObject);    
item3_mc.addEventListener(MouseEvent.MOUSE_UP, item3Release);    
done_btn.addEventListener(MouseEvent.CLICK, checkAnswers);    
reset_btn.addEventListener(MouseEvent.CLICK, reset);
item1_mc.buttonMode=true;    
item2_mc.buttonMode=true;    
item3_mc.buttonMode=true;


function dragTheObject(event:MouseEvent):void 
{ 
    var item:MovieClip=MovieClip(event.target); 
    item.startDrag(); 
    var topPos:uint=this.numChildren-5; 
    this.setChildIndex(item, topPos);    
}  
function item1Release(event:MouseEvent):void 
{ 
    var item:MovieClip=MovieClip(event.target); 
    item.stopDrag();       
    if (dropZone1_mc.hitTestPoint(item.x,item.y))
    { 
        item.x=dropZone1_mc.x; 
        item.y=dropZone1_mc.y; 
    } 
    else 
    { 
        item.x=orig1X; 
        item.y=orig1Y; 
    }
}    
function item2Release(event:MouseEvent):void 
{ 
    var item:MovieClip=MovieClip(event.target); 
    item.stopDrag();   
    if (dropZone2_mc.hitTestPoint(item.x,item.y)) 
    { 
        item.x=dropZone2_mc.x; 
        item.y=dropZone2_mc.y; 
    } 
    else 
    { 
        item.x=orig2X; 
        item.y=orig2Y; 
    }
}    

function item3Release(event:MouseEvent):void 
{ 
    var item:MovieClip=MovieClip(event.target);
    item.stopDrag();
    if (dropZone3_mc.hitTestPoint(item.x,item.y))
    {
        item.x=dropZone3_mc.x;
        item.y=dropZone3_mc.y;
    } 
    else 
    {
        item.x=orig3X;
        item.y=orig3Y;
    }
} 
function checkAnswers(event:MouseEvent):void 
{
    if (dropZone1_mc.hitTestPoint(item1_mc.x,item1_mc.y) &&
    dropZone2_mc.hitTestPoint(item2_mc.x,item2_mc.y) &&
    dropZone3_mc.hitTestPoint(item3_mc.x,item3_mc.y)) 
    {
        wrong_mc.visible = false;
        right_mc.visible = true;
    } 
    else 
    {
        wrong_mc.visible = true;
        right_mc.visible = false;
    }
}
function reset(event:MouseEvent):void {
    item1_mc.x=orig1X;
    item1_mc.y=orig1Y;
    item2_mc.x=orig2X;
    item2_mc.y=orig2Y;
    item3_mc.x=orig3X;
    item3_mc.y=orig3Y;
    right_mc.visible=false;
    wrong_mc.visible=false;
}
function itemRelease(event:MouseEvent):void {
    var thisItem:MovieClip = MovieClip(event.target);
    thisItem.stopDrag();
    if (dropZone1_mc.hitTestPoint(thisItem.x,thisItem.y)) 
    {
        thisItem.x = dropZone1_mc.x;
        thisItem.y = dropZone1_mc.y;
    } 
    else if (dropZone2_mc.hitTestPoint(thisItem.x,thisItem.y)) 
    {
        thisItem.x = dropZone2_mc.x;
        thisItem.y = dropZone2_mc.y;
    } 
    else if (dropZone3_mc.hitTestPoint(thisItem.x,thisItem.y)) 
    {
        thisItem.x = dropZone3_mc.x;
        thisItem.y = dropZone3_mc.y;
    }
    else if (thisItem==item1_mc) 
    {
        event.target.x = orig1X;
        event.target.y = orig1Y;
    } 
    else if (thisItem==item2_mc) 
    {
        event.target.x = orig2X;
        event.target.y = orig2Y;
    } 
    else {
        event.target.x = orig3X;
        event.target.y = orig3Y;
    }
}