Validation for unicode alphanumeric characters in javascript?

[Avnish]

Hi,

I am looking for some form of validation for all the alphanumeric
characters in the entire unicode range e.g. the validation should also
accept japanese characters but should restrict japanese punctuation
marks. I need this validation atleast for the CJKT range if not
possible for the entire unicode range. I can even make use of regular
expressions.

Also, please note that this validation should be in Javascript
language.

Thanks in anticipation.

Regards,
Avnish