if(document.images){
	btn_menu_00 = new Image(); btn_menu_00.src = '../../images/pic_logo_s_on.jpg';
	btn_menu_01 = new Image(); btn_menu_01.src = '../../images/btn_menu_01b.jpg';
	btn_menu_02 = new Image(); btn_menu_02.src = '../../images/btn_menu_02b.jpg';
	btn_menu_03 = new Image(); btn_menu_03.src = '../../images/btn_menu_03b.jpg';
	btn_menu_04 = new Image(); btn_menu_04.src = '../../images/btn_menu_04b.jpg';
	btn_menu_05 = new Image(); btn_menu_05.src = '../../images/btn_menu_05b.jpg';
	btn_menu_06 = new Image(); btn_menu_06.src = '../../images/btn_menu_06b.jpg';
	btn_menu_07 = new Image(); btn_menu_07.src = '../../images/btn_menu_07b.jpg';
}