function loadButtons() {
	var img1 = new Image();
	img1.src = "images/buttons/homeOn.jpg";
	var img2 = new Image();
	img2.src = "images/buttons/homeDown.jpg";
	var img3 = new Image();
	img3.src = "images/buttons/pianoOn.jpg";
	var img4 = new Image();
	img4.src = "images/buttons/pianoDown.jpg";
	var img5 = new Image();
	img5.src = "images/buttons/contactOn.jpg";
	var img6 = new Image();
	img6.src = "images/buttons/contactDown.jpg";
} // end loadbuttons

function swapImage(obj, source) {
	obj.src = "images/buttons/" + source + ".jpg";
} // end swapImage