var loadingImage = 'images/loading.gif';

addEvent('domready', function() {
	new Image().src = loadingImage;
	$$('.thumbnail').each(function(thumbnail) {
		new BubbleThumb({
			trigger: thumbnail,
			thumb: thumbnail.getElementsByTagName('IMG')[0],
			fullSrc: thumbnail.href,
			loaderHtml: '<img src="' + loadingImage + '" />'
		});
	});
});