How to fix header in another html page in website?

Question

I am developing a website. I design navbar with page link. But i want to design as like page when I click navbar button element show for webpage but header fixed. Anybody can help me.

Answer 1

you can 1: reuse the header on every single page
2: use iframe or similar element to navigate the website
3: use serverside language to generate the header for each single page