var openInNewWin = true;

var extras = new Array();
extras[0] = new Extra("http://www.internetbookshop.it/hme/hmepge.asp?shop=2138", "Compra libri, cataloghi, video e DVD sul sito di iBS.it", "../../../img/_extra/ibs_01.gif");
extras[1] = new Extra("http://web.artprice.com/in.aspx?idr=MDI4MzYyNTYwODczOTk=&L=en", "Trova prezzi e quotazioni di opere d'arte sul sito di artprice.com", "../../../img/_extra/artpr_01.gif");
extras[2] = new Extra("http://affiliates.allposters.com/link/redirect.asp?c=c&search=28945&AID=195579&PSTID=1&LTID=10&LID=1393&lang=1", "Trova il tuo poster di Van Gogh", "../../../img/_extra/allposters_01.gif");
extras[3] = new Extra("http://www.ninogalizzi.it/", "Visita Nino Galizzi Scultore", "../../../img/_extra/galiz_01.gif");

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


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