Login on top of every page?

[eluser]Unknown[/eluser]
[quote author="Cesar Kohl" date="1292185745"]I don't understand why you'll make a login with Ajax. Doing it with PHP is much simpler and best practice IMO.[/quote]

I'll do it with Ajax so the user does not have to reload the entire page and not have to bother with the redirect stuff above. I'll still be using PHP though, albeit together with [removed])