Display Both Products & Categories

for osCommerce Online Merchant v2.3

By default osCommerce only displays the products contained in a category if the category happens to contain both products and other subcategories. Since users browsing the web site might not notice that the category contains subcategories if they are listed only in the categories info box I wanted to display both the subcategories and the products contained in the category in the main window. This modification allows you to do that with simple changes to only one file. This is the updated version of the contribution intended for osCommerce 2.3 or later.