Friends entries

Hi, All

I need to get friends list in my app. I am going to run over html content and scrap needed data.
Do we have some way to specify in which style We get friends list  ( Something like this http://zuma.livejournal.com/friends?style=Everwhite&skip=10 or http://vodex.livejournal.com/friends/?s2id=StyleId&auth=digest ). 
How can i know what is the ID of certain style ?

Thanks.