function changeImage(picID, oo) {
	switch (oo){
		case "over":
			document.getElementById(picID).src = "../images/buttons/" + picID + "_over.jpg";
			break;
		case "out":
			document.getElementById(picID).src = "../images/buttons/" + picID + ".jpg";
			break;
		default:
			break;
	}
}