Область видимости функции

class MainZkxMenu
{
    private var ServiceBtName:String = "service_bt";
    private var top_mcName:String = "top";
    private var top_txt:String = "top_txt";
    private var top_txt_y:Number = 35;
    private var top_txt_x:Number = 315;
 
    private var type_bt_y:Number = 120;
    private var type_bt_x_start:Number = 0;
    var city_bt = null;
    private var categories_bt:Object;
    private var search_bt:Object;
    private var city_bt_name:String = "city_bt";
    private var categories_bt_name:String = "categories_bt";
    private var search_bt_name:String = "search_bt";
    var type_buttons = new Array();
    
    function MainZkxMenu()
    {
        MainConstructor();
    }
    
    function MainConstructor()
    {
        var top_plazka = _root.attachMovie(top_mcName, top_mcName, _root.getNextHighestDepth());
        top_plazka.attachMovie(top_txt, "top_txt", top_plazka.getNextHighestDepth(), {_x:top_txt_x, _y:top_txt_y});
        
        var city = city_bt = _root.attachMovie(city_bt_name, city_bt_name, _root.getNextHighestDepth(), {_x:type_bt_x_start, _y:type_bt_y});
        type_bt_x_start += city_bt._width;
        city_bt.stop();
        type_buttons.push(city_bt);
        city_bt.onRelease = function()
        {
            [B][COLOR="Red"]trace(Bt_click);[/COLOR][/B]        }
 
        categories_bt = _root.attachMovie(categories_bt_name, categories_bt_name, _root.getNextHighestDepth(), {_x:type_bt_x_start, _y:type_bt_y});
        type_bt_x_start += categories_bt._width;
        categories_bt.stop();
        type_buttons.push(categories_bt);
        
        search_bt = _root.attachMovie(search_bt_name, search_bt_name, _root.getNextHighestDepth(), {_x:type_bt_x_start, _y:type_bt_y});
        type_bt_x_start += search_bt._width;
        search_bt.stop();
        type_buttons.push(search_bt);
    }
    
    function Bt_click()
    {
          Test();
    }
    
    function Test()
    {
        trace("Test");
    }
}