There is an error message on facebook login

I captured an error message from my browser. Please check this.
Thanks in advance.

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Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB7.4; InfoPath.2)
Timestamp: Thu, 7 Feb 2013 01:44:22 UTC

Message: 'FB' is undefined
Line: 177
Char: 11
Code: 0
URI: http://www.medprime.ca/make-an-appointment/

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