Whenever you see something like '9234d87d07ad4a3f', you know that is hex. Whenever you see something like 'Kfj+sS8Absa==', it is a good bet it is base64. Hex uses 0-9,a-f (16 digits), base64 uses A-Z,a-z,0-9,/,+ (64 digits).
I'm trying to not give it away, but by Google searching "encode jquery" (without quotes), the answer was the 4th ("suggested") dropdown result.
Base64 decryption only works for the first part of the hash, though. The second part after the slash is still garbled. :/
try a different decoder (utf-8 is the key here i think) :)