Development question about mass update acrost multiple webpages

I'v ebeen tinkering for a while now and have come up with a webstie I like, its expanded quite a bit and continues to expand.

however, in its infancy lots of things were simple, such as adding a link to my nav bar, now that I have 12-15 pages opening each up to add a link is a PITA!

is there anyway to do a mass code update acrost multiple pages? is there any other way to incorporate a nav bar such that It wouldnt be on everypage? can I incorporate it into an external file and simply poin to it?

 

If you've got a copy of Dreamweaver, you could create a template, then re-create each of the 12-15 pages from the template. Each time you update the template, every page created from it updates too.

Or, you could opt for HTML includes, allowing you to include the nav bar on all pages, but simply change the one file. Unless anyone can think of a better way?

 

If that doesn't work, are there any service side scripting languages available (PHP, ASP, etc)?

 

Its quite simple to do it with PHP, I dont know ASP though.

 

http://php.about.com/od/tutorials/ht/template_site.htm

 

Thanks guys!