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







if (ad==1)
document.writeln('<iframe src=http://www.achus.info/ImpresionesWeb728x90.asp width=728 height=100 frameborder=0 marginwidth=0 marginheight=0 scrolling=no ></iframe>');

if (ad==2)
document.writeln('<iframe src=http://www.achus.info/Arriba-Megabanner.asp width=728 height=90 frameborder=0 marginheight=0 marginwidth=0 scrolling=no></iframe>');