howw do I programm a PREV & Next mechanism in PHP? Help Please!!

Hello! I'm making a database wich can be viewed and modified through a webbrowser using PHP and MySQL. I users wants to browse records from my (mysql) database, and the user can decide how many records he/she wants to see per page. There should be a Previous and a Next button on each page to brows through the records. (This is a very common situation wich is for example used by search engines.) My problem is, I really don't know how to make a Prev and Next system. I tried already a lot but it doesn't work. Does somebody have a PHP script with this working and can you send it to me please (or just the part with the prev/next meschanism)? It would help me a lot! Thanks in advance! Greetings Sander Peters - The Netherlands http://www.visionnet.nl/