Happy Monday to everyone!

I have a page that contains links to specific word document located on a UNIX server. When I click on the links, it ftp's the specific word doc to my webserver. What I need to do is delete these word documents from my web server when the user leaves the page. My question is, what is the best way of doing such a thing? Should I set a flag with session variables? Or is there a better of doing it? Thanks in advance for any responses. Now I'll take a nap until I get a reply, hehe. Just kidding.
John