Proxy.pac simple

function FindProxyForURL(url, host)
{
 if (isInNet(host, "10.0.0.0", "255.0.0.0"))
  { return "DIRECT";
  }

  if (isInNet(host, "172.16.0.0", "255.240.0.0"))
  { return "DIRECT";
  }

  if (isInNet(host, "192.168.0.0", "255.255.0.0"))
  { return "DIRECT";
  }

    }
else
{
return "PROXY 10.80.0.3:3128";
}
}