Based on "newpage.visible = true paperdoll.visible = false" and assuming your button and newpage are within the EquipmentPage object my guess is you need to use this code:
Code:
Parent.newpage.Visible=true Parent.PaperDoll.Visible=false
Use OnPress for now. After you get the button to work to hide the PaperDoll (why the hell is it called a paperdoll? it's a 3D real-time render) and how your window, you can either use a dual button system to show/hide, a single button that uses !Visible variables to toggle visibility, or a single checkbox to show/hide the two objects.
If you still have trouble, post your XML file.
Quib