Unable to boot when NFS share is unavaliable

The title sums it up,

I was unable to boot, and notices that my NAS was of, I have some shares from my nas.

This is from my fstab

santalucia:/volume1/music /mnt/music nfs bootwait,nouser,atime,auto,rw,dev,exec,nosuid 0 0
santalucia:/volume1/web /mnt/web nfs bootwait,nouser,atime,auto,rw,dev,exec,nosuid 0 0

I like to have them mounted automatically, but I sure don't like that I can't start if I have problems with my NAS, luckily I could just power the NAS up and then my PC booted...

Any ideas if I could set up a tiemout?