graf1_ = new Image(); graf1_.src="img/menu_01_.gif";
graf2_ = new Image(); graf2_.src="img/menu_02_.gif";
graf3_ = new Image(); graf3_.src="img/menu_03_.gif";
graf4_ = new Image(); graf4_.src="img/menu_04_.gif";
graf5_ = new Image(); graf5_.src="img/menu_05_.gif";
graf6_ = new Image(); graf6_.src="img/menu_06_.gif";