$('<div id="fixed-navigation-wrapper"></div>').insertAfter('#navigation');
$('#navigation').clone().appendTo('#fixed-navigation-wrapper').attr('id','fixed-navigation');
$(window).scroll(function(){
        var a, b;
        a = $(window).scrollTop();
        b = $('#navigation').offset().top;
        if (a > b) $('#fixed-navigation-wrapper').show();
        else $('#fixed-navigation-wrapper').hide();
        }
);