function preloadPaintings() {
	var preload = new Image();
	for (var i = 1; i <= 4; i++) {
		preload.src = "images/painting-" + i + ".jpg";
	}
}

function showPainting(number) {
	document.getElementById("splash").style.display = "none";
	document.getElementById("painting").style.display = "block";
	document.getElementById("painting").getElementsByTagName("img")[0].src = "images/painting-" + number + ".jpg";
}