whtml/10) { $('.sns-croll-to-top #sns-totop').fadeIn(); } else { $('.sns-croll-to-top #sns-totop').fadeOut(); } }); $('.sns-croll-to-top #sns-totop').click(function () { $('body,html').animate({ scrollTop: 0 }, 800); return false; }); }); // end back to top });