做了一个小例子

     模仿 键盘手机，的选择菜单功能：

import flash.events.MouseEvent;
var mc:Mc=new Mc();
mc.x=35.65;
mc.y=92;
addChild(mc);


up_btn.addEventListener(MouseEvent.CLICK,up);
function up(e:MouseEvent):void
{
    if (mc.y == 35.65)
	{
		mc.y = 140.65;
	}
    mc.y -=  35;
}

down_btn.addEventListener(MouseEvent.CLICK,down);
function down(e:MouseEvent):void
{


	mc.y +=  35;
	if (mc.y == 140.65)
	{
		mc.y = 35.65
	}


}