DOM and XHMTL

Hi,

I wonder if a can use DOM with XHMTL to do dynamic text features like
expand and collapse?

How should the code look like for this scenario:

When i click on the playername it would expand like this:

Playername1
Playername2
Playername3

Playername1
Text1
Text2
Text3
Playername2
Playername3

Help

Thanx