separate each image row into its own gallery - eg http://www.boutiqueresidential.com.au/renting.html
<script>
$(document).ready(function(){
//WHAT NUMBER TO START COUNTING FROM
var count = 0;
//LOOP THROUGH EVERY ROW
$(".contentImgRow").each(function(){
//SET THE REL ATTR TO GALLERY PLUS COUNT FOR EACH CHILD
$(this).find(".overlayImg").attr("rel", "gallery" + count++);
});
});
</script>