$(document).ready(function() {
	var DURATION = 300;
	var OVERLAY = '.callout-overlay';
	var IMAGE = '.callout-image';
	
	$(OVERLAY).css('opacity', '0');
	$(OVERLAY).show();
	
	$(OVERLAY).mouseenter(function() {
		$(this).animate({ opacity: .52 }, {
			duration: DURATION,
			queue: false
		});
	});
	$(OVERLAY).mouseleave(function() {
		$(this).animate({ opacity: 0 }, {
			duration: DURATION,
			queue: false
		});
	});
});