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,
    SINGLE_QUOTE: 222
  };

  // UI constants
  var VERTICAL_SPACING = 6; // Pixels between input field and suggestion box

  $.fn.suggestor = function (setting) {