Adjusting Indexed Field After Deleting Entry

Hello, Here is one of my smaller PHP projects. I'm trying to finish it before I move on to my CMS project. http://www.g-i-w-s.com/linker_admin.php The script does nothing more then manage links. It lists an indexed number of the link, a url, a text description and a delete option. Here's my question. I originally had a link #1, #2, and #3. I obviously deleted them. I was wondering if there is a way to use PHP/MySQL to get the indexed numbers to re-assign so that the first link you see is always #1 the second link you see is always #2 and so on? Thanks in advance, Roger PS The original script was not mine, it came from a 'php how to' article at web monkey, I did some modifications to fit what I needed. We don't want anyone thinking that I'm taking credit for their knowledge ;-)