Absolute vs relative URLs

Question

I would like to know the differences between these two types of URLs: relative URLs (for pictures, CSS files, JS files, etc.) and absolute URLs.

In addition, which o

Answer 1

I would heartily recommend relative URLs for pointing bits of the same site to other bits of the same site.

Don't forget that a change to HTTPS - even if in the same site - is going to need an absolute URL.