A Pop-Up to get people to register for my drupal site?

I'd like to get a CSS style pop-up to come up on my page to get someone to register for my site.

Here is an example: http://www.socialfundamentals.com/blog/ What you'll notice is that the CSS-pop-up comes up only after about 60 seconds, so its not right away.

(BTW: They use Softsqueeze)

Is there any module or any way to do this across my drupal site?

Thanks
-BigSend
BigSend World (my drupal site 5.10)