Hey all first post =)

First problem with my Focus =/

When the engine is on and in idle it squeaks constantly over and over again as if it was in a pattern.
I put my put my head in the engine and it seems to be near the only belt that is visible, and I dont know what belt this is or even if it is the problem.

It squeaks as it's idling.
It squeaks as I'm driving and increases alot when I rev it. I've revved it idle too and the squeak gets worse and faster.

It's constantly on but not sure about when I'm hitting 50-70mph.

Any ideas?

I've read other websites and suggestions say it can be cambelt or timing belt.

Also is it bad? lol
I'm going to get it looked at but before that I need to know a rough price on labour and fixing.

Cheers