Using a Database via Web Browser

I would like to know what I need in order to use my Access 2003 databases via a web browser. Currently, I have databases that I have on a shared folder on a file server. My users open MS Access 2003 on their local computers and then open the databases from the shared drive. What I would like to do, is have them open their web browser instead of MS Access and use the database from within the browser. Functions such as entering data into forms or running reports is about the most they would be doing.