Please give me an effect fadeIn to load The work.

my code: to load not work fadeIn?
Code JavaScript:
$('#icon a').click(function(event){
        event.preventDefault();
        var id = '#'+this.id;
        var url = $(id).attr('href');
        $('.table_show, #add_icon, #num_count, #select_box, #input_search').fadeOut('slow', function(){
            $('.results').load(url).fadeIn("slow")
        });
    });