var how_many_ads = 3;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
alt="book And globe";
banner="images/loop/book_globe.gif";
width="160";
height="120";
}
if (ad==2) {
alt="book";
banner="images/loop/copybook.gif";
width="160";
height="120";
}
if (ad==3) {
alt="Stationery Book";
banner="images/loop/stationery_book.gif";
width="160";
height="120";
}
//document.write('<center>');
document.write('<img src=\"' + banner + '\" width=')
document.write(width + ' height=' + height + ' ');
document.write('alt=\"' + alt + '\" border=5><br>');
//document.write('</center>');
// End