var how_many_ads = 4;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
var url = url
var alt = alt
var banner = banner
var width = width
var height = height
ad +=1;
if (ad==1) {
url="http://www.nicooptical.co.uk/wales/gallery/";
alt="Gallery Images of Wales";
banner="http://www.nicooptical.co.uk/wales/banners/new-quay.jpg"; width="690px"; height="246px";
}
if (ad==2) {
url="http://www.nicooptical.co.uk/wales/gallery/";
alt="Photo Gallery Ceredigion Images of Wales";
banner="http://www.nicooptical.co.uk/wales/banners/aberporth.jpg"; width="690px"; height="246px";
}
if (ad==3) {
url="http://www.nicooptical.co.uk/wales/gallery/";
alt="Gallery Images of Wales";
banner="http://www.nicooptical.co.uk/wales/banners/penbryn.jpg"; width="690px"; height="246px";
}
if (ad==4) {
url="http://www.nicooptical.co.uk/wales/gallery/";                                                          
alt="Gallery Images of Wales";
banner="http://www.nicooptical.co.uk/wales/banners/llangrannog.jpg"; width="690px"; height="246px";
}
document.write('<A HREF=\"' + url + '\" TARGET=\"_top\">');
document.write('<IMG SRC=\"' + banner + '\" WIDTH=')
document.write(width + ' HEIGHT=' + height + ' ');
document.write('ALT=\"' + alt + '\" BORDER=0><BR>');