var ad_count = 4;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % ad_count;
ad +=1;
if (ad==1) {
url="http://www.pigeonbasics.com/advert.php";
target="_top";
alt="Advertise on Pigeonbasics.com";
banner="http://www.pigeonbasics.com/images/advert/ad.gif";
width="99";
height="109";
}
if (ad==2) {
url="http://www.pigeonbasics.com/news/";
target="_top";
alt="Pigeonbasics.com - News";
banner="http://www.pigeonbasics.com/images/advert/news.gif";
width="100";
height="110";
}
if (ad==3) {
url="http://forum.pigeonbasics.com/";
target="_top";
alt="Pigeonbasics.com - Message Forum";
banner="http://www.pigeonbasics.com/images/advert/messageforum.gif";
width="100";
height="110";
}
if (ad==4) {
url="http://www.plosoft.com/";
target="_top";
alt="Pigeon Loft Organiser";
banner="http://www.pigeonbasics.com/images/advert/plo.gif";
width="100";
height="110";
}
document.write('<a href="' + url + '" target="' + target + '">');
document.write('<img src="' + banner + '" width='+ width + ' height=' + height + ' alt="' + alt + '" border=0></a>');