var how_many_ads = 4;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
banner="/membersonly/bizdoc/images/hp_mainphoto1.jpg";
}
if (ad==2) {
banner="/membersonly/bizdoc/images/hp_mainphoto2.jpg";
}
if (ad==3) {
banner="/membersonly/bizdoc/images/hp_mainphoto3.jpg";
}
if (ad==4) {
banner="/membersonly/bizdoc/images/hp_mainphoto4.jpg";
}
document.write('<img src=\"' + banner + '\" width=224 height=186 border=0')