CSS tour hits Atlanta, and they’re there to find Cat Power

I have many similar pages with the same heading, menu and footnote. If I want to make a change to one of these, do I have to make the change to every individual page or can I call an external file that includes html code, change it there and the changes will apply to all pages? Sort of a template.

My first css movie!
O meu primeiro Movie!

Instead of adding an external image preview “IMG SRC”, I would like to add an external html preview. Craigslist has a 3000 character limit, so I hosted the text on my personal website. Is there an html link that I can enter into craigslist that will show the html on my website? I am not talking about simply linking to my url. I would like it to actually show up on craigslist, like “img src” does. Thanks in advance!
I do not want the html to show, just the output of the html.

What your waiting for!!!
http://www.rewards1.com/index.php?referrer_id=215133

Created by Monty Oum.
http://www.gametrailers.com/player/usermovies/193489.html

To see more videos created by Monty Oum.
http://montyoum.gametrailers.com/gamepad/index.php?action=fanmovs

Heres a link to Dead Fantasy 1
http://www.gametrailers.com/player/usermovies/115884.html

Heres the YouTube link to Dead Fantasy 1
http://www.youtube.com/watch?v=w5v0_TjBxY8

Check out Monty’s website!!
http://montyoum.deviantart.com/

First Single from the Reel Big Fish album “Monkeys For Nothin’ and the Chimps For Free”. Directed and Produced by Tyler Trautman