var YOOgalleryfx = new Class({
initialize: function(container){
	var fx = [];
	$(container).getElements('.thumbnail').each(function(el, i) {
		var image = el.getElement('img');
		image.setStyle('opacity', 0.3);
		fx[i] = image.effect('opacity',{
			duration: 1000, wait: false
		});
		el.addEvents({
			mouseenter: function(event) {
				fx[i].setOptions({ 'duration': 500 });
				fx[i].start(0.3,1);
			},
			mouseleave: function(event) {
				fx[i].setOptions({ 'duration': 1000 });
				fx[i].start(1,0.3);
			}
		});
	});
}});