I am trying to code something but I can't make it work. I have 16 buttons on a page. The buttons are broken into four sets of four with the text on each button in each set being A B C D. The buttons are then labeled A1, A2, A3, B1,B2, B3 and so on. Each set of ABCD are then layered on top of each other so the A is on top showing four A buttons next to each other on the screen. As each button is clicked it becomes disabled and invisible leaving the one below exposed. I have another button labeled ENTER. When I click that button I want it to look to see if certain buttons are enabled (example A1, B2, C3, D4) and if they are to play a ding sound and jump to page two. If they are not enabled then I want to play and buzz sound and reset all the buttons back to their original state.

