scrollTo animate Facebook

pvt.fb.js

    // http://stackoverflow.com/questions/7193425/how-do-you-animate-fb-canvas-scrollto
    function scrollTo(y){
        FB.Canvas.getPageInfo(function(pageInfo){
            $({y: pageInfo.scrollTop}).animate(
                {y: y},
                {duration: 1000, step: function(offset){
                    FB.Canvas.scrollTo(0, offset);
                }
            });
        });
    }