if (document.images) {
	menu00_on = new Image();
	menu00_on.src = "./images/menu00_on.png"; 
	menu00_off = new Image();
	menu00_off.src = "./images/menu00_off.png";

	menu01_on = new Image();
	menu01_on.src = "./images/menu01_on.png"; 
	menu01_off = new Image();
	menu01_off.src = "./images/menu01_off.png";

	menu02_on = new Image();
	menu02_on.src = "./images/menu02_on.png"; 
	menu02_off = new Image();
	menu02_off.src = "./images/menu02_off.png";

	menu03_on = new Image();
	menu03_on.src = "./images/menu03_on.png"; 
	menu03_off = new Image();
	menu03_off.src = "./images/menu03_off.png";

	menu04_on = new Image();
	menu04_on.src = "./images/menu04_on.png"; 
	menu04_off = new Image();
	menu04_off.src = "./images/menu04_off.png";

	menu05_on = new Image();
	menu05_on.src = "./images/menu05_on.png"; 
	menu05_off = new Image();
	menu05_off.src = "./images/menu05_off.png";
    	
	menu06_on = new Image();
	menu06_on.src = "./images/menu06_on.png"; 
	menu06_off = new Image();
	menu06_off.src = "./images/menu06_off.png";
}