var how_many_ads = 8; 
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;

if (ad==1) { url="http://hopelessthunder.org"; alt="Hopeless Thunder"; banner="http://i36.tinypic.com/25zmps0.gif"; width="88"; height="31"; }

if (ad==2) { url="http://paper-cranes.net/"; alt="Paper-Cranes"; banner="http://paper-cranes.net/images/pc01.png"; width="88"; height="31"; }

if (ad==3) { url="http://cynthia.paper-cranes.net/"; alt="Sweet Obsessions"; banner="http://i382.photobucket.com/albums/oo262/artistof09/88x31.png"; width="88"; height="31"; }

if (ad==4) { url="http://gvd-paperplanes.com/"; alt="Gvd-Paper Planes"; banner="http://gvd-paperplanes.com/ppbutton2.png"; width="88"; height="31"; }

if (ad==5) { url="http://skybreaker.info/"; alt="Skybreaker"; banner="/sky.gif"; width="88"; height="31"; }

if (ad==6) { url="http://sarah.paper-cranes.net/"; alt="Retro Smiles"; banner="http://i37.tinypic.com/2ewe0za.jpg"; width="88"; height="31"; }

if (ad==7) { url="http://fashionablesparkles.webs.com"; alt="Fashionable Sparkles"; banner="http://i50.photobucket.com/albums/f327/pikkuliisa/Buttons/fsbutton1-3.gif"; width="88"; height="31"; }

if (ad==8) { url="http://candyswirl.pixelfx.org/"; alt="Candy Swirl"; banner="http://i65.photobucket.com/albums/h220/doubtfan82/candyswirl_icons/candyswirl_gwenlive_8831.png"; width="88"; height="31"; }

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>');