Actionscript 3 错误1120访问未定义的属性

我是动作脚本3的新手，我经常遇到两个1120错误。其中一个错误是

C:\Users\Server\Desktop\New folder\InteractiveStoryBook\Main.as, Line 31  1120: Access of undefined property onFrogMouseOver  

另一个错误是

C:\Users\Server\Desktop\New folder\InteractiveStoryBook\Main.as, Line 32    1120: Access of undefined property onFrogClick. 

我正确地添加了所有实例，但仍然得到错误。 以下是错误所在区域的代码：

public function Main()
    {
        hillPage = new HillPage();
        pondPage = new PondPage();
        startPage = new StartPage();
        addChild(pondPage);
        startPage.hillButton.addEventListener(MouseEvent.CLICK, onHillButtonClick);
        startPage.pondButton.addEventListener(MouseEvent.CLICK, onPondButtonClick);
        hillPage.backToStartButton.addEventListener(MouseEvent.CLICK, onBackButtonClick_Hill);
        pondPage.backToStartButton.addEventListener(MouseEvent.CLICK, onBackButtonClick_Pond);
        hillPage.upButton.addEventListener(MouseEvent.CLICK, onUpButtonClick);
        hillPage.downButton.addEventListener(MouseEvent.CLICK, onDownButtonClick);
        hillPage.growButton.addEventListener(MouseEvent.CLICK, onGrowButtonClick);
        hillPage.shrinkButton.addEventListener(MouseEvent.CLICK, onShrinkButtonClick);
        hillPage.visibilityButton.addEventListener(MouseEvent.CLICK, onVisibilityButtonClick);
        hillPage.lookButton.addEventListener(MouseEvent.CLICK, onLookButtonClick);
        hillPage.leftButton.addEventListener(MouseEvent.CLICK, onLeftButtonClick);
        hillPage.rightButton.addEventListener(MouseEvent.CLICK, onRightButtonClick);
        pondPage.frog.addEventListener(MouseEvent.MOUSE_OVER, onFrogMouseOver);
        pondPage.frog.addEventListener(MouseEvent.CLICK, onFrogClick);

        function onHillButtonClick(event:MouseEvent):void
        {
            addChild(hillPage);
            removeChild(startPage);
        }
        function onPondButtonClick(event:MouseEvent):void
        {
            addChild(pondPage);
            removeChild(startPage);
        }
        function onBackButtonClick_Hill(event:MouseEvent):void
        {
            addChild(startPage);
            removeChild(hillPage);

        }
        function onBackButtonClick_Pond(event:MouseEvent):void
        {
            addChild(startPage);
            removeChild(pondPage);
        }
        function onUpButtonClick(event:MouseEvent):void
        {
            hillPage.cat.y -=  15;
            if (hillPage.cat.y < 90)
            {
                hillPage.cat.y = 90;

            }
            trace(hillPage.cat.y);
        }
        function onDownButtonClick(event:MouseEvent):void
        {
            hillPage.cat.y +=  15;
            if (hillPage.cat.y > 238)
            {
                hillPage.cat.y = 238;
            }
            trace(hillPage.cat.y);
        }
        function onGrowButtonClick(event:MouseEvent):void
        {
            hillPage.cat.scaleX +=  0.1;
            hillPage.cat.scaleY +=  0.1;
        }
        function onShrinkButtonClick(event:MouseEvent):void
        {
            hillPage.cat.scaleX -=  0.1;
            hillPage.cat.scaleY -=  0.1;
        }
        function onVisibilityButtonClick(event:MouseEvent):void
        {
            hillPage.cat.visible = ! hillPage.cat.visible;
        }
        function onLookButtonClick(event:MouseEvent):void
        {
            hillPage.cat.leftEye.rotation +=  20;
            hillPage.cat.rightEye.rotation +=  20;
        }
        function onLeftButtonClick(event:MouseEvent):void
        {
            if (hillPage.cat.x >= 240)
            {
                hillPage.cat.x -=  15;
            }
        }
        function onRightButtonClick(event:MouseEvent):void
        {
            if (hillPage.cat.x <= 487)
            {
                hillPage.cat.x +=  15;
            }
            function onFrogMouseOver(event:MouseEvent):void
            {
                pondPage.frog.goToAndStop(2);
                pondPage.frog.removeEventListener(MouseEvent.MOUSE_OVER, onFrogMouseOver);
            }
            function onFrogClick(event:MouseEvent):void
            {
                pondPage.frog.goToAndStop(3);
                pondPage.frog.removeEventListener(MouseEvent.CLICK, onFrogClick);
            }
        }
    }
}
}

public函数Main（）
{
hillPage=新的hillPage（）；
水池=新水池（）；
起始页=新起始页（）；
addChild（pondPage）；
startPage.hillButton.addEventListener（MouseEvent.CLICK，onHillButtonClick）；
startPage.pondButton.addEventListener（MouseEvent.CLICK，onPondButtonClick）；
hillPage.backToStartButton.addEventListener（MouseEvent.CLICK，在BackButtonClick_Hill上）；
pondPage.backToStartButton.addEventListener（MouseEvent.CLICK，onBackButtonClick_Pond）；
hillPage.upButton.addEventListener（MouseEvent.CLICK，onUpButtonClick）；
hillPage.downButton.addEventListener（MouseEvent.CLICK，onDownButton单击）；
hillPage.growButton.addEventListener（MouseEvent.CLICK，ongrowButton单击）；
hillPage.shrinkButton.addEventListener（MouseEvent.CLICK，onShrinkButton单击）；
hillPage.visibilityButton.addEventListener（MouseEvent.CLICK，on visibilityButton单击）；
hillPage.lookButton.addEventListener（MouseEvent.CLICK，onLookButtonClick）；
hillPage.leftButton.addEventListener（MouseEvent.CLICK，onLeftButtonClick）；
hillPage.rightButton.addEventListener（MouseEvent.CLICK，onRightButton单击）；
pondPage.frog.addEventListener（MouseEvent.MOUSE_OVER，onFrogMouseOver）；
pondPage.frog.addEventListener（MouseEvent.CLICK，onFrogClick）；
函数onHillButtonClick（事件：MouseEvent）：void
{
addChild（hillPage）；
removeChild（起始页）；
}
函数onPondButtonClick（事件：MouseEvent）：void
{
addChild（pondPage）；
removeChild（起始页）；
}
函数onBackButtonClick_Hill（事件：MouseEvent）：void
{
addChild（起始页）；
removeChild（山丘）；
}
函数onBackButtonClick_Pond（事件：MouseEvent）：void
{
addChild（起始页）；
清除积水；
}
函数onUpButtonClick（事件：MouseEvent）：void
{
山丘类别y-=15；
if（山丘类别y<90）
{
山丘类型y=90；
}
迹线（山丘，y类）；
}
函数onDownButtonClick（事件：MouseeEvent）：无效
{
山丘类别y+=15；
if（山丘类别y>238）
{
山丘类型y=238；
}
迹线（山丘，y类）；
}
函数onGrowButtonClick（事件：MouseEvent）：void
{
hillPage.cat.scaleX+=0.1；
hillPage.cat.scaleY+=0.1；
}
收缩按钮上的函数单击（事件：MouseEvent）：无效
{
hillPage.cat.scaleX-=0.1；
hillPage.cat.scaleY-=0.1；
}
函数onVisibilityButton单击（事件：MouseeEvent）：无效
{
hillPage.cat.visible=！hillPage.cat.visible；
}
函数onLookButtonClick（事件：MouseEvent）：void
{
hillPage.cat.leftEye.rotation+=20；
hillPage.cat.rightEye.rotation+=20；
}
函数onLeftButtonClick（事件：MouseEvent）：void
{
如果（hillPage.cat.x>=240）
{
山丘类别x-=15；
}
}
函数onRightButtonClick（事件：MouseEvent）：void
{
如果（hillPage.cat.x您的方法
onFrogMouseOver
和
onFrogClick
嵌套在
onrightbutonclick
中

将它们移出
onright按钮单击
块：

function onRightButtonClick(event:MouseEvent):void
{
    if(hillPage.cat.x <= 487)
    {
        hillPage.cat.x +=  15;
    }

    // They were previously defined here.
    // Removed and put below.
}

function onFrogMouseOver(event:MouseEvent):void
{
    pondPage.frog.goToAndStop(2);
    pondPage.frog.removeEventListener(MouseEvent.MOUSE_OVER, onFrogMouseOver);
}

function onFrogClick(event:MouseEvent):void
{
    pondPage.frog.goToAndStop(3);
    pondPage.frog.removeEventListener(MouseEvent.CLICK, onFrogClick);
}

右键上的函数单击（事件：MouseEvent）：无效
{
if（hillPage.cat.x