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.5chicago.com/mailx/househeadmondays.jpg";
alt="househead mondays at ole lounge";
banner="http://www.5chicago.com/campaigns/househeadmondays.jpg";
width="475";
height="103";
}
if (ad==2) {
url="http://www.purplemusic.ch/";
alt="purple music party at wmc with jamie lewis";
banner="http://www.5chicago.com/campaigns/purple-475.jpg";
width="475";
height="103";
}
if (ad==3) {
url="http://www.morehouserecords.com/";
alt="morehouse records";
banner="http://www.5chicago.com/campaigns/morehouse-475.jpg";
width="475";
height="103";
}
if (ad==4) {
url="http://www.earthbeats.net/";
alt="earthbeats";
banner="http://www.5chicago.com/campaigns/earthbeats-475.jpg";
width="475";
height="103";
}

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>');