Event.observe(window, "load", function ()
{
	$$("img.changeThumbnail").each(function (item){
		Event.observe(item, "mouseover", function () {
			gallery.src = item.src.substr(0, item.src.length - 4) + ".jpg"; 
		});
	});

	Event.observe($("gallery"), "load", function () {  });
});