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

if (ad==1) {
url="http://www.househeadspeaks.com/";
alt="house head speaks";
banner="http://www.5chicago.com/calendar/october2011-images/househead-speaks-300.jpg";
width="300";
height="300";
}

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