Dynamic X static content

Hi all.

I have a website with tons of “static” webpages, written in word (argh!), with frames to divide menu and page content (duh!) and all that old HTML stuff. My task now is to transform those old pages with a new layout, and I am starting with the menu.

I am current learning some CSS3 and HTML5 and my question is: Is there a way to insert a menu without to insert in every single page? I thought with CSS/HTML, maybe using a language (thought in Python/Django)? Any ideas experts?

Thanks!!!