Hi webmasters! My questions are: (1) Should I rather use absolute hyperlinks on my homepage or relative? Whats better for google & page rank? (2) If my domain is PR4, can be my PR higher when new sites of PR<4 (pr lower than 4) will be linking to my domain? I know I'll have advantage of linking text but what about my PR?
Relative URL's are only relative before they are processed by a server and browser (or robot).
If I put www.mydomain.com/mypage.htm it looks exactly the same to a spider (or surfer) once it's fetched the page as "/mypage.htm" as the domain name is automatically attached. Relative URL's are mainly useful to save coding time (and make it easier to move to a new domain name with the same site structure). I'm certain it's irrelevant for crawlers.
We use absolute URL's for external file references and internal links. We use relative URL's for images and other non-important link references. There will hopefully be a few who will reply to this topic and give you the pros and cons of absolute vs. relative URLs, especially when it comes to internal linking between pages. I don't think either or has any bearing on your PageRank.
But, if someone else hooks up to your relative URL, that could be a different story! ;)