AS3 - 自製簡易下拉次選單

我的方法其實很傻瓜，就是次選單的出現是用遮罩，
次選單一開始不在遮罩範圍內，看不見也不會成為滑鼠的觸摸範圍。


語法如下>>

//import TweenLite
import com.greensock.*;
import com.greensock.plugins.*;
TweenPlugin.activate([TintPlugin]);

//設定滑鼠摸到menu_1的事件
menu_1.addEventListener(MouseEvent.MOUSE_OVER,doOver1);
function doOver1(e:MouseEvent):void
{
 TweenLite.to(menu_1.sub_menu_mask, 1, {scaleY:155});
 TweenLite.to(menu_1.sub_bg, 0.5, {alpha:1});
 TweenLite.to(menu_1.txt, 0.5, {tint:0xffff00});

}

//設定滑鼠離開menu_1的事件
menu_1.addEventListener(MouseEvent.MOUSE_OUT,doOut1);
function doOut1(e:MouseEvent):void
{
 TweenLite.to(menu_1.sub_menu_mask, 0.5, {scaleY:1});
 TweenLite.to(menu_1.sub_bg, 0.5, {alpha:0});
 TweenLite.to(menu_1.txt, 0.5, {tint:null});

}

menu_2.addEventListener(MouseEvent.MOUSE_OVER,doOver2);
function doOver2(e:MouseEvent):void
{
 TweenLite.to(menu_2.sub_menu_mask, 1, {scaleY:155});
 TweenLite.to(menu_2.sub_bg, 0.5, {alpha:1});
 TweenLite.to(menu_2.txt, 0.5, {tint:0xffff00});
 
}

menu_2.addEventListener(MouseEvent.MOUSE_OUT,doOut2);
function doOut2(e:MouseEvent):void
{
 TweenLite.to(menu_2.sub_menu_mask, 0.5, {scaleY:1});
 TweenLite.to(menu_2.sub_bg, 0.5, {alpha:0});
 TweenLite.to(menu_2.txt, 0.5, {tint:null});

}


menu_3.addEventListener(MouseEvent.MOUSE_OVER,doOver3);
function doOver3(e:MouseEvent):void
{
 TweenLite.to(menu_3.sub_menu_mask, 1, {scaleY:155});
 TweenLite.to(menu_3.sub_bg, 0.5, {alpha:1});
 TweenLite.to(menu_3.txt, 0.5, {tint:0xffff00});

}

menu_3.addEventListener(MouseEvent.MOUSE_OUT,doOut3);
function doOut3(e:MouseEvent):void
{
 TweenLite.to(menu_3.sub_menu_mask, 0.5, {scaleY:1});
 TweenLite.to(menu_3.sub_bg, 0.5, {alpha:0});
 TweenLite.to(menu_3.txt, 0.5, {tint:null});

}

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