Is using INCLUDES script for the header and footer good with SEO?

I wanted to use the INCLUDES script that will grab external html and place it in a page. I was thinking of using this for the header and footer for every page.

Is this a good idea? Will it interfere with SEO?

I hate to have to change every footer and header on every page if there is an edit.

Is there a be开发者_运维问答tter approach?

Many thanks.

The person (or search engine) viewing the page can't tell whether you've used server side includes or not. Make a useful site and the googles will come.