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="";
alt="";
banner="images/home_image1.jpg";
width="768";
height="248";
usemap="";
}
if (ad==2) {
txt="";
url="";
alt="";
banner="images/home_image2.jpg";
width="768";
height="248";
usemap="";
}
if (ad==3) {
txt="";
url="";
alt="";
banner="images/home_image3.jpg";
width="768";
height="248";
usemap="";
}
if (ad==4) {
txt="";
url="";
alt="";
banner="images/home_image4.jpg";
width="768";
height="248";
usemap="";
}


document.write('<img src=\"' + banner + '\" width=')
document.write(width + ' height=' + height + ' ');
document.write('alt=\"' + alt + '\"  usemap=\"' + usemap + '\" border=0>');
//document.write('<small>' + txt + '</small></a>');
//document.write('</center>');
// End -->