var imageFunction = function (request, xml){
				img = $('largeimg');
				img.effects({duration: 1000}).start({'opacity':[1,0]});

				var response = xml.documentElement;
				var src = response.getElementsByTagName("imagepath")[0].firstChild.nodeValue;
				var caption = response.getElementsByTagName("imagecaption")[0].firstChild.nodeValue;

				var asset;
				new Asset.image(src, {id: 'largeimg', onload: function() {
					img.effect({duration: 1000}).start(0).chain(function() {
						img.setProperty('src', src);
						$('caption').setHTML(caption);
						img.effect({duration: 1000}).start(1);
					})

				}});
		}