simple parallax button scrolling jquery codepen

/*  jQuery codes for smooth scrolling. The following code is from  https://css-tricks.com/snippets/jquery/smooth-scrolling/*/$(function() {  $('a[href*=#]:not([href=#])').click(function() {    if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') && location.hostname == this.hostname) {      var target = $(this.hash);      target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');      if (target.length) {        $('html,body').animate({          scrollTop: target.offset().top        }, 700);        return false;      }    }  });});/*  Back to top scroll button. The following code is from  http://jsfiddle.net/gilbitron/Lt2wH/*/if ($('#back-to-top').length) {  var scrollTrigger = 100, // px    backToTop = function() {      var scrollTop = $(window).scrollTop();      if (scrollTop > scrollTrigger) {        $('#back-to-top').addClass('show');      } else {        $('#back-to-top').removeClass('show');      }    };  backToTop();  $(window).on('scroll', function() {    backToTop();  });  $('#back-to-top').on('click', function(e) {    e.preventDefault();    $('html,body').animate({      scrollTop: 0    }, 700);  });}