i am getting this error on the main chat page
any suggestions?

Line: 5
Char: 11182
Error: 'undefined' is null or not an object
Code: 0
URL: http://www.teltech.com.mx/chat/cutesoft_client/cutechat/ch_mainform.aspx?channelid=342e78ba-5718-4be3-b46a-9ff3f65e4e99