Sticky Tool Best

Link Tutorial : http://leafo.net/sticky-kit/
Fixed Tutorial: http://www.jqueryscript.net/other/jQuery-Plugin-For-Creating-Sticky-Html-Elements-Sticky-Kit.html
Laking Full tutorial : https://github.com/leafo/sticky-kit/wiki/Troubleshooting

// HERE IS JQUERY CODE ON INDEX.PHP FOOTER
$(".categories, .cart-box").stick_in_parent({
        //offset_top: 20,
        parent: ".main", // note: we must now manually provide the parent
        //spacer: ".item",
        //inner_scrolling: true,

      }).on("sticky_kit:stick", function(e) {
          console.log("has stuck!", e.target);
        });