Creating a Simple Scroll-To-Top Animation ("Back to Top" Button)

By using the animate and scrollTop jQuery functions you don't need a plugin .

// Back to top
$('a.top').click(function () {
  $(document.body).animate({scrollTop: 0}, 800);
  return false;
});

<!-- Create an anchor tag -->
<a class="top" href="#">Back to top</a>

Changing the scrollTop value changes where you want the scrollbar to land. All you're doing is animating the body of the document throughout the course of 800ms until it scrolls all the way to the top of the document.