Help me fix a bug!

The backspace key sometimes works in No Crypto For Old Men and sometimes it doesn't, depending on the browser. I would like to fix this bug, but I need your help!

The readouts below should change when you hit keys. What happens when you hit the backspace key in your browser? What number appears, and does it appear in all slots, or just some?

KeyDown Event
KeyPress Event
KeyUp Event

Reset