This is an embedded zoom viewer with internal thumbnails gallery.
It has a navigation bar below the viewer to load different images from several folders.
The navigation bar uses bootstrap "navbar" CSS construct and it is not an integral part of the viewer.
This example also demonstrates the
$.fn.axZm.loadAjaxSet AJAX-ZOOM API method.
With this method, you can replace images that are already loaded into the viewer.
It has a few options documented at the bottom of this page.
Feel free to adapt it.