[Radiant] How to get the content ID from the database?

[rainer griess]

Hi again,

I asked about something similar in the AJAX Interaction thread. But I  
would like to make the question simler:

How can I get the child ID of the child within an <r:children:each>  
loop?

I have to use the ID to define some CSS classes on the fly and  
therefore I need a unique name.

Any ideas?

Thanks your,
rainer