update,

dreamtech.hk/mtHK.github.io-main/js/element-in-view.js

@@ -0,0 +1,42 @@
+(function($) {
+
+  /**
+   * Copyright 2012, Digital Fusion
+   * Licensed under the MIT license.
+   * http://teamdf.com/jquery-plugins/license/
+   *
+   * @author Sam Sehnert
+   * @desc A small plugin that checks whether elements are within
+   *     the user visible viewport of a web browser.
+   *     only accounts for vertical position, not horizontal.
+   */
+
+  $.fn.visible = function(partial) {
+
+      var $t            = $(this),
+          $w            = $(window),
+          viewTop       = $w.scrollTop(),
+          viewBottom    = viewTop + $w.height(),
+          _top          = $t.offset().top,
+          _bottom       = _top + $t.height(),
+          compareTop    = partial === true ? _bottom : _top,
+          compareBottom = partial === true ? _top : _bottom;
+
+    return ((compareBottom <= viewBottom) && (compareTop >= viewTop));
+
+  };
+
+})(jQuery);
+
+$(window).on('scroll', function() {
+
+  $(".testimonial-author .author-one, .testimonial-author .author-two, .testimonial-author .author-three,  .testimonial-author .author-four,  .testimonial-author .author-five, .testimonial-avatar .avatar-one, .testimonial-avatar .avatar-two, .testimonial-avatar .avatar-three, .testimonial-avatar .avatar-four, .testimonial-avatar .avatar-five, .testimonial-avatar .avatar-six").each(function(i, el) {
+    var el = $(el);
+    if (el.visible(true)) {
+      el.addClass("now-in-view");
+    } else {
+      el.removeClass("now-in-view");
+    }
+  });
+
+});