var how_many_ads =6;
var now = new Date();
var sec = now.getSeconds();
var ad = sec % how_many_ads; 
ad +=1;

if (ad==1) {
banner="../images/headercdc_01.gif";
}

if (ad==2) {
banner="../images/headerawal.jpg";
}

if (ad==3) {
banner="../images/headeronly3_01.jpg";
}
if (ad==4) {
banner="../images/headeronly4_01.jpg";
}
if (ad==5) {
banner="../images/headeronly5_01.jpg";
}
if (ad==6) {
banner="../images/headeronly6_01.jpg";
}


document.write('<img src=' + banner + ' width=770 height=180 alt=Corona Diving Club border=0>');