var openInNewWin = true;
var banners = new Array();
banners[0] = new Banner("http://www.vasonline.it/", "Verdi Ambiente Società", "../images/banner_vasonline.gif");
banners[1] = new Banner("http://www.vasonline.it/campagne/mangiasano/index.htm", "Mangiar Sano", "../images/banner_vasitalia.gif");
banners[2] = new Banner("http://www.rfb.it/csa/links/ogm.htm", "Sicurezza Alimentare", "../images/sicurezza_alimentare2.gif");
banners[3] = new Banner("http://www.aiab.it/", "Associazione Italiana Agricoltura Biologica", "../images/banner_aiab.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 src=\"" + banners[bNum].image + "\" border=\"0\" alt=\"" + banners[bNum].description + "\">");
document.write("</a>");