function display (url, width, height) {
	$('#display_image').css('display', 'none');
	padding_sides = Math.floor((gallery_max_width - width) / 2);
	padding_top = Math.floor(
	  (gallery_max_height - thumbnail_row_max_height - thumbnail_row_padding_top - height) / 2
	);
	$('#display_image').attr('src', url);
	$('#display_image').css('width', width);
	$('#display_image').css('height', height);
	$('#display_image').css('top', padding_top);
	$('#display_image').css('left', padding_sides);
	$('#display_image').css('display', 'block');
	return false;
}