cocos2d-js中一个奇怪的bug，或许的用法错误，望各位大神进来看看！

Cocos2d-x
#1

代码简要如下：

//card.js文件中

var Card = cc.Sprite.extend({
//省略代码
});

//cardControl.js文件中

var CardControl = cc.Node.extend({
 cards : ],
 ctor : function () {
        this._super();
        for (var i = 0; i < 5; ++i) {
            this.cards* = new Card();
            this.cards*.attr({x:i*10, y:0, anchorX:0, anchorY:0.5});
            this.addChild(this.cards*);
        }
    },
//后两张牌移动
   startOpenAction : function() {
        var action = cc.moveBy(1, cc.p(this.OPENCARDLEN, 0));
        this.cards.runAction(action);
        this.cards.runAction(action.clone());
    }
});



//mainlayer.js文件代码
var MainLayer = cc.Layer.extend({
cardControls:],
 ctor : function () {
        this._super()

        var size = cc.winSize;
        for (var i = 0; i < 4; ++i) {
            this.cardControls.push(new CardControl());
            this.cardControls*.tag = i;
            this.addChild(this.cardControls*);
        }

        this.cardControls.attr({x:size.width-330, y:size.height-180});
        this.cardControls.attr({x:size.width-330, y:size.height-420});
        this.cardControls.attr({x:200, y:size.height-585});
        this.cardControls.attr({x:140, y:size.height - 280});

    },

 touchStartEvent : function (sender, type) {
        switch(type) {
            case ccui.Widget.TOUCH_ENDED:

                var cardCtrl = this.getChildByTag(0);
                cardCtrl.startOpenAction();
                break;
        }
    }
});


```

当点击按钮响应touchStartEvent 函数时， cardControl类中的startOpenAction 函数中的this.cards数组竟然始终是cardControls数组的最后一个cardControl成员的this.cards值，
对此例来说就是cardControl.cards的值也就是(cardControl.cards, cardControl.cards, cardControl.cards,始终等于cardControl.cards)，但是cardControl类的children里面的值却没有错，求解

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