Event.observe(document, 'dom:loaded', function(e) {

	$$('.about-thumbs .thumbs img').invoke('observe', 'mouseover', function(e) {
																			
		thumb = Event.element(e);
		
		image = thumb.up('.thumbs').previous('img');
		
		source = thumb.src;
		
		
		image.src = image.src.substring(0,image.src.length-5) + source.substring(thumb.src.length-5, thumb.src.length)
																			
	});
	
});