$(document).ready(function(){
	
	// replace .fader with something that matches your css
	$('.fader').each(function(index){
		
		$(this).mouseover(function(){
			$(this+'.thumb a img').animate({opacity: "0.75"}, 100);
		});
		
		$(this).mouseout(function(){
			$(this+'.thumb a img').animate({opacity: "1.0"}, 100);
		});
		
	});
	
});