[Typo3] How to get parent id of current page?

[Pawe³ Stanis³awczuk]

Hello,

Another question is how to get PID's of some level i.e


root
--main1(uid:1)
----sub1(uid:3)
----sub2(uid:4)
----sub3(uid:5)
------subsub1(uid:7)
------subsub2(uid:8)
--main2(uid:2)
----sub1(uid:6)

To get the UID of main level, while surfin' in subsub level, how to do that?

greetz,
Pawe³ Stanis³awczuk