var lightboxHelper = {
		
	addGallery: function() {
		var collection = document.getElementsByTagName('a');
		for(var i=0; i < collection.length; i++) {
			var rel = collection[i].getAttribute('rel') || collection[i].rel;
			if(rel && rel === "lightbox") {
				rel = "lightbox[gallery]";
			}
		}
	}
};

if(document.observe) { // prototype framework
	document.observe('dom:loaded', function () { lightboxHelper.addGallery(); });
}