adam-s

       // http://stackoverflow.com/questions/21474678/scrolltop-animation-without-jquery
        function scrollToTop() {
            var deferred = $q.defer();

            var content = document.getElementById('content');

            var scrollDuration = 1200 * ((content.scrollTop / content.offsetHeight));

            var cosParameter = content.scrollTop / 2,
                scrollCount = 0,