var how_many_ads = 1;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;

if (ad==1)
{
	id="1";
	url="www.arta-web.com/cgi-bin/index.cgi";
	alt="Entra a la nova página Web de l'Ajuntament!!";
	img="artabann.gif";
	width="468";
	height="60";
	border="0";
}

	
document.write("<a href=http://www.arta-web.com/cgi-bin/ads/banners.pl?id=" + id + "&url=" + url +">");
document.write("<img src=http://www.arta-web.com/ads/" + img + " border=" + border + " width=" + width + " height=" + height + " alt='" + alt + "'>");
document.write("</a>");