function printad(url, banner, width, height, alt, txt){
  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=0><br>');
  document.write('<small>' + txt + '</small></a>');
  document.write('</center>');
}

var how_many_ads = 8;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
txt="";
url="training.htm";
alt="";
banner="images/banners/pic"+ad+".jpg";
width="100";
height="350";
printad(url, banner, width, height, alt, txt);
}
if (ad==2) {
txt="";
url="training.htm";
alt="";
banner="images/banners/pic"+ad+".jpg";
width="100";
height="350";
printad(url, banner, width, height, alt, txt);
}
if (ad==3) {
txt="";
url="training.htm";
alt="";
banner="images/banners/pic"+ad+".jpg";
width="100";
height="350";
printad(url, banner, width, height, alt, txt);
}
if (ad==4) {
txt="";
url="training.htm";
alt="";
banner="images/banners/pic"+ad+".jpg";
width="100";
height="350";
printad(url, banner, width, height, alt, txt);
}
if (ad==5) {
txt="";
url="training.htm";
alt="";
banner="images/banners/pic"+ad+".jpg";
width="100";
height="350";
printad(url, banner, width, height, alt, txt);
}
if (ad==6) {
txt="";
url="training.htm";
alt="";
banner="images/banners/pic"+ad+".jpg";
width="100";
height="350";
printad(url, banner, width, height, alt, txt);
}
if (ad==7) {
txt="";
url="training.htm";
alt="";
banner="images/banners/pic"+ad+".jpg";
width="100";
height="350";
printad(url, banner, width, height, alt, txt);
}
if (ad==8) {
txt="";
url="training.htm";
alt="";
banner="images/banners/pic"+ad+".jpg";
width="100";
height="350";
printad(url, banner, width, height, alt, txt);
}