How to use the INCLUDE function on .htm pages?

Gosh... isn't there a simpler way to do this?

I want to minimize scripts that load from external sources - for the sake of speeding the page up.

At first I wanted to do this with an iFrame, but that's a bit laggy and not as sophisticated as a PHP code. But INCLUDE won't load from a .htm page.

Javascript slows the page down...

Thanks for helping, but isn't there a simpler solution? It's a very simple site, really...

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