function adjust(image) {
	var w = $(image).width();
	var h = $(image).height();
	var pw = $(image).parents('li').outerWidth();
	var ph = $(image).parents('li').outerHeight();

	$(image).css('margin-left', (pw-w)/2 + 'px').css('margin-top', (ph-h)/2 + 'px').css('visibility', 'visible');
}

$(window).load(function() {
	$('.gallery li img').each(function() {
		var image = $(this);
		image.css('visibility', 'hidden');
		var w = image.width();
		var h = image.height();
		var pw = image.parents('li').outerWidth();
		var ph = image.parents('li').outerHeight();
		image.css('margin-left', (pw-w)/2 + 'px').css('margin-top', (ph-h)/2 + 'px').css('visibility', 'visible');
	});
});