Hiding Fields

I'm wondering how I can hide a field on my form.
It's a Stateless form currently with just a 'Next' button. It cycles through the records of another form.
I can't use 'Hide' and 'Show' except in 'On Load' and 'User Add' I think.
I want to Show a field that says 'Last Record' when on Last Record, and Hide it any other time.
I've been able to remove the label by editing the Form Definition, but can't remove the Text box outline.

Any ideas would be welcomed!

Thanks - Graeme