window.addEvent('domready', function() {
	$$('img.gal_thumb').each(function(img){
		img.setStyle('opacity', '0.5');
		var fxop = img.effect('opacity', {duration:500, transition: Fx.Transitions.Quad.easeOut, wait:false});
		img.addEvent('mouseover', function(e){
			e = new Event(e);
			fxop.start(1);
			e.stop();
		});
		img.addEvent('mouseout', function(e){
			e = new Event(e);
			fxop.start(0.5);
			e.stop();
		});
	});
});