[urgent] Need help on simple OOP [HELP]

programming flash
1

here’s a part of my code

                    var youtubeID:String="zUFrX2pY83Q";
		var Movie1:YouTube=new YouTube(youtubeID);
		Movie1.x = 180;
		Movie1.y = -225;
		Gallery_Bg.addChild(Movie1);

how to put a “if” statement that check whether if(Gallery_Bg.contains(Movie1));???

i can’t put like this “if(Gallery_Bg.contains(Movie1));” because Movie1 is not a globla variable since it needs a the “new” keywords (new YouTube(youtubeID)) for it to generate a new one everytime i open a new video…

can anyone answer me how to check?