common process to key event

keyEventDetect.js

// key name
var key_names = {
    32: 'SPACE',
    13: 'ENTER',
    9: 'TAB',
    8: 'BACKSPACE',
    16: 'SHIFT',
    17: 'CTRL',
    18: 'ALT',
    20: 'CAPS_LOCK',
    144: 'NUM_LOCK',
    145: 'SCROLL_LOCK',
    37: 'LEFT',
    38: 'UP',
    39: 'RIGHT',
    40: 'DOWN',
    33: 'PAGE_UP',
    34: 'PAGE_DOWN',
    36: 'HOME',
    35: 'END',
    45: 'INSERT',
    46: 'DELETE',
    27: 'ESCAPE',
    19: 'PAUSE',
    222: "'"
};

// get key
var key = e.keyCode || e.which;

// detect right click
var rightclick = (e.which) ? (e.which == 3) : (e.button == 2);