The "tabs" in the title of the page are being generated using the CSS "sliding doors" technique described at http://www.alistapart.com/articles/slidingdoors. The layout template file includes a stylesheet definition that highlights the appropriate tab based on the value of PmWiki's $action global variable. The tabs also resize appropriately with changes in text size.
The modifications to the JH skin are that Mac-Like images were added and more tabs were added.
This is a test again