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.soloimagen.net/Arriba-Megabanner.asp width=728 height=90 frameborder=0 marginheight=0 marginwidth=0 scrolling=no></iframe>');

if (ad==2)
document.writeln('<iframe src=http://www.soloimagen.net/Arriba-Megabanner2.asp width=728 height=90 scrolling=no frameborder=0 border=0></iframe>');

if (ad==3)
document.writeln('<iframe src=http://www.soloimagen.net/Arriba-Megabanner3.asp width=728 height=90 scrolling=no frameborder=0 border=0></iframe>');