You see this on many websites.
Take, for example,
www.neopets.com. They have a side bar with all these buttons such as "explore", "games", etc, and you'll see this side bar on every single page that's within the domain of
www.neopets.com.
If I want to make an extensive website, and if I want to have the same menu bar attached to every single webpage I make, how can I go about doing that?
It wouldn't be a good idea to use frames because this feature is not available on some browsers.
It wouldn't be a good idea to copy & paste because, if I want to change the menu bar, I'll have to make the same changes on every single page, which is tedious.
Is there a good way to achieve this?
As you love along, many backend languages (ie. PHP and the like) will let you use includes. I always just put the sidebar and other components into external files then included them into my pages.
(Just a side note: On the 2nd line of this post, why is the period after "www.neopets.com" part of the hyperlink? A bug, maybe?)
It could be due to the fact that you didn't use proper [url= ][ /url] tags... just a guess.