var how_many_ads = 4;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
url="http://www.boomboomroomchicago.com/";
alt="bbr";
banner="http://www.5chicago.com/campaigns/boomboomroom-march-235.jpg";
width="235";
height="235";
}
if (ad==2) {
url="http://www.farriswheel-recordings.com/";
alt="steppin";
banner="http://www.5chicago.com/campaigns/gene-farris-rev09-235.jpg";
width="235";
height="235";
}
if (ad==3) {
url="http://www.ssradiouk.com/miami";
alt="steppin";
banner="http://www.5chicago.com/campaigns/ssradio-235x235.jpg";
width="235";
height="235";
}
if (ad==4) {
url="http://www.ssradiouk.com/";
alt="steppin";
banner="http://www.5chicago.com/campaigns/covered-235x235.jpg";
width="235";
height="235";
}



document.write('<center>');
document.write('<a href=\"' + url + '\" target=\"_top\">');
document.write('<img src=\"' + banner + '\" width=')
document.write(width + ' height=' + height + ' ');
document.write('alt=\"' + alt + '\" border=\"0\"><br>');
document.write('</center>');