jQuery.fn.fadeToggle = function(speed, easing, callback) {
   return this.animate({"top": 'toggle', "opacity":'toggle'}, speed, easing, callback); 
};

$(document).ready(function(){
//imageover opacity
	$('.highlights').animate({"opacity":1});
	
	$('.highlights').hover(function(){
		$(this).stop().animate({"opacity":0},300);
	}, function(){
		$(this).stop().animate({"opacity":1});
	});
});