<script src="http://webmaster-ucoz.ru/ucoz/1/vverkh/material-scrolltop.js"></script>
       <button class="material-scrolltop" type="button"></button>
       <script>
       $(document).ready(function() {
       $('body').materialScrollTop({
       revealElement: '.header',
       revealPosition: 'bottom',
       onScrollEnd: function() {
       console.log('Scrolling End');
       }
       });
       });
       </script>