Splitting up article in Intro text with Read more button - like Joomla has

[eluser]CI_adis[/eluser]
Hi all,
Just been looking for a functionality Joomla has:
There you create an article with a Intro text (done by a pagebreak).
If the user want to read more he can click on the Read more button.

But how can I set this up, in a good way, in CodeIgniter??
Does anyone tried this before?
Would appreciate your ideas!

Cheers Adis