Identify Client Cipher Strength

This post is very helpful regarding redirect on week Encryption, I want to create a iRule display or redirect customer to a page telling them they have low cipher strength and need to have SSLv3 and TLSv1.0 enabled for their browser. I was looking into the F5 Dev site and found this http://devcentral.f5.com/wiki/default.aspx/iRules/RedirectOnWeakEncryption.html , but it only works for browser lower than 128 bit encryption, I need it for SSLv3 and TLSv1.0 as well. Is there a way to do this? can you please help? Thanks.