JavaScript: Radio button and checkbox replacement

checked.js

/**
 * Radio button and checkbox replacement
 * Author: Jakub Korzeniowski
 * Agency: Softhis
 * http://www.softhis.com
 */
(function($) {

	$.fn.checked = function() {

		return this.each(function() {
	 		var $org = $(this).filter(':radio, :checkbox'),
	 			$repl = $('<span />', {
	 				class: $org.attr('type')
	 			});
	 		if($org.is(':checked')) {
	 			$repl.addClass('checked');
	 		}
	 		$org.css({
	 			visibility: 'hidden',
	 			position: 'absolute',
	 			'z-index': -1
	 		}).after($repl.bind('click', function(e) {
	 			if($repl.hasClass('checked')) {
	 				$repl.removeClass('checked');
	 				$org.attr('checked', false);
	 			} else {
	 				$repl.addClass('checked');
	 				$org.attr('checked', true);
	 			}
	 		}));
	 	});

	};

 })(jQuery);