[CentOS] disable autofs timeout

Hi,

Does setting the autofs timeout=0 create a permanent mount?

What I'm trying to do is get the best of both world;

1) Have a persistent mount so that users can use autocompletion.
2) utilize the benefits of autofs so that when an NFS resource becomes  
unavailable, the system doesn't hang.

I've tried a timeout of 0 but it doesn't seem to work.