var how_many_ads = 4;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;

if (ad==1) {
txt="";
url="http://www.mvagustausa.com/web-mvagusta/index2.html";
alt="MV Agusta USA";
banner="http://www.mvagustausa.com/index/08_F4312RR.jpg";
width="692";
height="121";
}
if (ad==2) {
txt="";
url="http://www.mvagustausa.com/web-mvagusta/index2.html";
alt="MV Agusta USA";
banner="http://www.mvagustausa.com/index/08_F4CC.jpg";
width="692";
height="121";
}
if (ad==3) {
txt=""; 
url="http://www.mvagustausa.com/web-mvagusta/index2.html";
alt="MV Agusta USA";
banner="http://www.mvagustausa.com/index/08_F41KR.jpg";
width="692";
height="121";
}
if (ad==4) {
txt=""; 
url="http://www.mvagustausa.com/web-mvagusta/index2.html";
alt="MV Agusta USA";
banner="http://www.mvagustausa.com/index/08_B1078RR.jpg";
width="692";
height="121";
}
document.write('<center>');
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('</right>');