I cant get internet on my ipod touch when i am conected to wi-fy

My solution is a bit similar to Amnok,

If you ARE far away from the router. I suggest you come closer to the router. So that you can connect to Wi-Fi Network easily and surf faster. If you want to, you can set the router with an extra antenna for extended range.

This error means you're not connected to an internet-enabled network. If you want to surf the internet, you'll need to connect to a wireless network; you do that by going into Settings, then Wi-Fi.

If the WiFi option is off, press it to turn it on and it'll scan for near by networks. Once you find one that is unprotected, or one to which you know the password, you can connect to it by pressing its name. Once you connect, if that network allows for internet access, you can surf.

If you don't have any wireless networks within range, you can always set one up yourself. You can do it either with a wireless router, which will give you a permanent access point you can use whenever you feel like, or using a laptop - but that's difficult, not permanent, and has a very short signal range (Though it's free if you already have a laptop with a wi-fi card).