js获取键盘按键的键码event.keyCode,下面则是键盘的键码分布，记录一下，以备不时之需

图片版：点击看大图网上收集的KeyCode值方便大家查找： keycode 8 = BackSpace BackSpace keycode 9 = Tab Tab keycode 12 = Clear keycode 13 = Enter keycode 16 = Shift_L keycode 17 = Control_L keycode 18 = Alt_L keycode 19 = Pause keycode 20 = Caps_Lock keycode 27 = Escape Escap