Adjust height for chat and chat room window

[BTanJingZhong]

Hi where is the template to adjust the size of the height of the chat window and the chat room window, right now the height of a chat window is: 235px looking at element class="arrowchat_tabpopup arrowchat_tabopen" I want to change it to height 500px coz the chat is very small and hard to have a normal conversation... If you can tell me which template to edit I will throw arrowchat into Dreamweaver and fix it.