convert encoded javascript?
 

I found this snippet in the head of a gallery. Javascript is not my forté, so I've not been having much success decoding it to determine if it's malicious or benign.

Any javascript gurus around here that can turn this back into readable code?

That is bad stuff, comes from an FTP exploit. Change your FTP password, have your host check your FTP logs. I would suspect hundreds if not thousands of files have been affected. Scan your machine for spyware/keyloggers/malware and don't use the same password as before.