卷軸平滑捲動到頁面元素

scrollToElement.js

//smooth scroll to #id
var $root = $('html, body');
$('a.bookmark').click(function() {
  var href = $.attr(this, 'href');
  $root.animate({
      scrollTop: $(href).offset().top
  }, 500, function() {
      window.location.hash = href;
  });
  return false;
});