Well, you haven't declared "val", so we'll assume it is an "int".
If you read an analogue pin, unless it is nailed to ground, it will almost certainly read > 0, so that might need some attention too.
The infrared LED is hooked up to digital pin 13
...via a suitable resistor, I assume?
I have the regular LED attached to digital pin 12
...ditto.
I think you may be a little optimistic expecting a 20cm range.