jQuery link easing for Tiafau on his final day :' (

gistfile1.txt

    <script>
        $(".intro-message a").on('click', function(e) {
           e.preventDefault();
           var hash = this.hash;

           $('html, body').animate({
               scrollTop: $(hash).offset().top
             }, 3000, function(){
               window.location.hash = hash;
             });
        });
    </script>