As far as I know, there isn't a difference between .htm and .html. However, .shtml files are used when the server is equipped to handle Server Side Includes (SSI). With SSI, you just have to add a simple tag to all of your HTML pages, and it will automatically replace that tag with the code found in a specified file. This comes in handy for making header or footer files, so that you only have to change one file to have the layout change for every page, rather than having to change the HTML in every single file. There are some other things that SSI can do, but I'm only really familiar with using them for headers and footers.
Jeff's quite right. I beleive they can do time with them also? Anyway, TFN uses shtml for headers and footers ¤Night
You can use SSI with a CGI script such as Newspro to dynamically update the news on your page without editing the HTML.
http://hoohoo.ncsa.uiuc.edu/docs/tutorials/includes.html http://www.within-reason.com/tutorial/shtml.html http://www.bignosebird.com/ssi.shtml http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=SHTML+tutorial ¤Night Edit: Just fixed up the problem the boards were having with your links.