var KEY_CODES = {
    BACKSPACE: 8,
    ENTER: 13,
    SPACE: 32,
    UP: 38,
    DOWN: 40,
    DELETE: 46,
    NUM_0: 48,
    NUM_9: 57,
    A: 65,
    Z: 90,
    NUMPAD_0: 96,
    NUMPAD_9: 105,
    SEMICOLON: 186,
    EQUALS: 187,
    DASH: 189,
    FORWARD_SLASH: 191,
    GRAVE: 192,
    OPEN_BRACKET: 219,
    BACK_SLASH: 220,
    CLOSE_BRACKET: 221,