var openInNewWin = true;
var banners = new Array();
banners[0] = new Banner("http://www.ilcastellodimelegnano.com", "Gli affreschi del castello di Melegnano", "images/banner/melegnano1.gif");
banners[1] = new Banner("http://www.sarastefanini.it", "SaraStefanini.it - Sviluppo Web e Formazione Professionale", "images/banner/sarastefanini468x60.gif");
banners[2] = new Banner("http://www.ateneo-online.com", "Ateneo-Online - Sito italiano di formazione e cultura", "images/banner/ateneo-online468x60.gif");

function Banner(url, description, image) {
	this.url = url;
	this.description = description;
	this.image = image;
	return this;
}
var bNum = Math.round(Math.random() * (banners.length - 1));


document.write("<a href=\"" + banners[bNum].url + "\"");
if (openInNewWin) {
	document.write(" target=\"_blank\"");
}
document.write(">");
document.write("<img hspace='2' vspace='2' src=\"" + banners[bNum].image + "\" border=\"0\" alt=\"" + banners[bNum].description + "\">");
document.write("</a>");