Preloading HTML

I wondering how to preload my website before the user sees anything…

examples:

http://www.2advanced.net/

and

http://www.iamvica.com/

…I saw the post by Voet pointing the last request to http://javascriptkit.com/script/scr…oadimage2.shtml but I don’t want to have an actual preloader, I want it to load before changing the page like what they’re doing at 2advanced.net.

Anyone able to help me out?

Thank you in advance!