How do I change website content without touching every page?

[Erraticspark576]

Best way to do this it to use a programming language such as PHP.

http://www.php.net

I use this on my websites. It allows you to mix code and HTML.
Every page has to have a php extension and your web server has to support PHP scripting (most do).

You would have your header file saved and then use the
<?php include('filename.inc'); ?>
line to get your standard header and footer into any page.

Wil .