I like Chady's method of counting through them: quick and easy solution. I implement all the pages on my website using a similar solution (templates + server side includes). Using an incremental counter also allows you to provide for a user variable, at a later date, that can be saved in a cookie.

I could come up with pseudo code for this one, but hopefully someone else will have some good ideas for real code. If I don't see anything later on today, I could post it.