var how_many_ads = 3;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;

ad +=1;
if (ad==1) {
url="http://www.brownsfloraldesign.com/";
banner="banner_ads/BrownsFlorist/BrownsFlorist1.gif";
width="120";
height="400";
}
if (ad==2) {
url="http://www.wkjv.org/";
banner="banner_ads/WKJV/WKJV.gif";
width="120";
height="400";
}
if (ad==3) {
url="http://www.brownsweddingdesign.com";
banner="banner_ads/BrownsFlorist/BrownsFlorist21.gif";
width="120";
height="400";
}
document.write('<center>');
document.write('<a href=\"' + url + '\" target=\"_blank\">');
document.write('<img src=\"' + banner + '\" width=')
document.write(width + ' height=' + height + ' ');
document.write('</center></a>');