The file sitemenu.php provides the horizontal menu for all pages on the site (which is why it is in the root). Content for items listed on this horizontal menu is in individual folders bearing the same names as the menu items. Individual sidebar menu php files, as well as cascading style sheets, are located inside of each of these folders to provide custom sidebar menus and formating for the pages in each horizontal category. Google adsense code for the top horizontal menu lives in the "adsensemenu.php" file in the site's root folder and is called by a php include form the heading.php located in each section folder. Adsense code for the individule content pages lives in the adsensecontentpage.php and is called by a php include from each page.