function writeBanner() {

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.wsrca.com/conv_news/index.htm";
banner="http://www.wsrca.com/wsrca_images/banner_ads/Homepage_Banner.jpg";
width="468";
height="60";
}
if (ad==2) {

url="http://www.wsrca.com/conv_news/index.htm";
banner="http://www.wsrca.com/wsrca_images/banner_ads/Homepage_Banner.jpg";
width="468";
height="60";
}
if (ad==3) {
 
url="http://www.wsrca.com/conv_news/index.htm";
banner="http://www.wsrca.com/wsrca_images/banner_ads/Homepage_Banner.jpg";
width="468";
height="60";
}

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

}