numImages = 6;
rpiImages = new Array((100))
for(i = 1; i <= numImages; i++)	{
		if (i < 10) {
			zero = "0";
		} else {
			zero = "";
		}
		rpiImages[i] = new Image();
		rpiImages[i+numImages] = new Image();
		rpiImages[i].src = "images/menu_off_"+zero+i+".gif";
		rpiImages[i+numImages].src = "images/menu_on_"+zero+i+".gif";
}

function on_image(loc, img)	{
	img+=numImages;
	document.images[loc].src=rpiImages[img].src;
}


function off_image(loc, img){
	document.images[loc].src=rpiImages[img].src;
	window.status='';
	return true;
}