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.cyanweb.com.au";
banner="http://www.streetsofperth.com.au/bannerbin/cyanweb.gif";
where="_self";
}
if (ad==2) {
url="http://www.cyanweb.com.au";
banner="http://www.streetsofperth.com.au/bannerbin/cyanweb.gif";
where="_self";
}
document.write('<a href=\"' + url + '\" target=\"' + where + '\"><img src=\"' + banner + '\" border=0 vspace=0></a>');