(function($){
		 $.fn.extend({
			  center: function () {
					return this.each(function() {
							var top = ($(window).height() - $(this).outerHeight()) / 2;
							var left = ($(window).width() - $(this).outerWidth()) / 2;
							$(this).css({position:'absolute', margin:0, top: (top > 0 ? top : 0)+'px', left: (left > 0 ? left : 0)+'px'});
					});
			}
		 });
	})(jQuery);
	
	$(window).bind('resize', function() {
		$('#container').center();
	});