swifty

    $(document).scroll(function(e){
      var $window = $(window)
      var $authors = $('.author')
      if($authors.length > 0) {
        $authors.each(function(i, e) {
          var $author = $(e)
          var $container = $author.parent().parent()
          var offset = Math.max(0, $window.scrollTop() - $container.offset().top + 50)
          offset = Math.min($container.height() + $container.offset().top - $author.outerHeight() - 50, offset)
          var currentOffset = parseFloat($author[0].style.top)
          if(offset !== currentOffset) {
            $author.css({top:offset})
          }
        })
      }
    }).scroll()