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="natura-farm";
url="http://www.natura-farm.ch/";
alt="natura-farm";
bild="../jss/s01.jpg";

}


if (ad==2) {
txt="natura-farm";
url="http://www.natura-farm.ch/";
alt="natura-farm";
bild="../jss/s02.jpg";

}




document.write('<center>');
document.write('<a href=\"' + url + '\" target=\"_top\">');
document.write('<img src=\"' + bild + '\"');
document.write('alt=\"' + alt + '\" border=0><br>');
document.write('</center>');