I volunteer editing/updating a website for my sons school. The site has an IFRAME for it's picture gallery. To add a group photos I added a folder into a the 'Pictures" folder and when you go the Main Gallery it works fine and it's relatively simple. My problem is that I want the most recent group of folders to be at the top of the gallery index but they more or less come in at the bottom. Is there a way to sort them. Inside the "pictures" folder is an "index.php" file which I thought is some kind of configuration file but it's not. Sorry for the lengthy question. Here is a link to the picture gallery index.
This is my first time posting so I apologize in advance for breaking any rules. Thanks