var how_many_ads = 2;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
url="http://www.5chicago.com/subscribe/index.html";
alt="zentra";
banner="http://www.5chicago.com/campaigns/subscribecampaign235x235.jpg";
width="235";
height="235";
}
if (ad==2) {
url="http://www.5chicago.com/list.html";
alt="zentra";
banner="http://www.5chicago.com/campaigns/eblastcampaign235x235.gif";
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>');