function showTitle(title) {
	document.getElementById('painting-title').innerHTML = title;
}

function main() {
	// add mouseOver to thumbnails
	var container = document.getElementById("thumbnails");
	var thumbnails = container.getElementsByTagName("img");
	var titles = new Array;
	
	for(var y = 0; y < thumbnails.length; y++) {
		thumbnails[y].setAttribute("onmouseover", "showTitle(this.alt)");
	}
}