This is an HTML program with Javascript and CSS implementations.

1) Hide / Show: Layout a button labeled "Hide", and a nearby div containing some text. When you press hide, the div should disappear, and the button's text should change to "Show". If you press the button again, the div should reappear, and the button's text should change to "Hide" and be back to the starting functionality. 0) Calculator Hide 1) Hide / Show This text will appear and disappear. 2) Change 7 Styles