// Behaviour rules for photo galleries
var rules = {
	'div#infospace img': function(el) {
		el.onclick = function() {
			var fullPicture = $$('div#imagespace img')[0];
			var newURL = this.src.replace('thumbnail', 'photo');
			if (newURL != fullPicture.src) {
				fullPicture.src = newURL;
			}
		}
	}
};