[jQuery] [validate] Problem with code in ie6 - Object doesn't support method

[jQuery] [validate] Problem with code in ie6 - Object doesn't support method


Hi,
Any chance someone could look at the following and give me some clues?
http://www.edenvillamedical.co.uk/
The jqQuery Validate function works fine in Safari, Firefox, Opera but
throws an error in ie6 (i've not been able to test yet in ie7).
Validates the form under the 'Prescriptions' tab.
The error is:
Line: 30
Char: 1
Error: Object doesn't support this property or method
Can't figure this out, any help really appreciated.
Regards
Matt