var how_many_ads = 2;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;

ad +=1;
if (ad==1) {
txt="AirPortail";
url="http://www.airportail.com/";
alt="AirPortail.com";
banner="http://qoach.org/clickcount/airportail.gif";
width=468;
height=60;
}
if (ad==2) {
txt="Hotels";
url="http://fr.abchotelbooking.com";
alt="AbcHotelBooking.com";
banner="http://qoach.org/clickcount/abchotelbookingbanner.gif";
width=468;
height=60;
}
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=1>');
document.write('</a>');
document.write('</center>');