function rollover(thisLink) {
	img = thisLink.firstChild;
	var selected = img.src.search(/&type=selected/i);
	if (selected < 0) {
		var highlighted = img.src.search(/&type=highlighted/i);
		if (highlighted >= 0) img.src = img.src.substr(img.src, highlighted) + "";
		else img.src = img.src + "&type=highlighted";
	}
}