var how_many_ads = 4;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;

if (ad==1)
{
	id="1";
	url="www.banner-link.com.br/l2.asp?conta=14016&nbanner=1";
	alt="";
	img="www.banner-link.com.br/b3.asp?conta=14016&nbanner=";
	width="468";
	height="60";
	border="0";
	target="_blank";
}

if (ad==2)
{
	id="2";
	url="www.uor.com.br";
	alt="Universo Off-Road";
	img="www.uor.com.br/banners/banneruor.gif";
	width="468";
	height="60";
	border="0";
	target="_blank";
}

if (ad==3)
{
	id="5";
	url="www.compassnet.com.br";
	alt="Compass - Instrumentação Digital e Cronometragem";
	img="www.compassnet.com.br/imagens/banner.gif";
	width="468";
	height="60";
	border="0";
	target="_blank";
}


if (ad==4)
{
	id="1";
	url="www.banner-link.com.br/l2.asp?conta=14016&nbanner=1";
	alt="";
	img="www.banner-link.com.br/b3.asp?conta=14016&nbanner=";
	width="468";
	height="60";
	border="0";
	target="_blank";
}


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