Hello friends

I'm developing a "XHtml Chat Popup Window", what I need what appears like the MSN Messenger chat window.

Basically, will have 3 parts:
- Header
- Transcripts
- TextArea and "Send" button

As usual, I'm with trouble in Transcripts part take 100% height. Too, is required what the popup window can be resized.

Someone knows some method or some model/template/etc where I can start? I have tried Msn Web Messenger, but is not XHtml...