boolean getModifierState(
    in DOMString keyIdentifierArg); 

void initKeyboardEvent(
    in DOMString type, 
    in boolean canBubble, 
    in boolean cancelable, 
    in DOMWindow view, 
    in DOMString keyIdentifier, 
    in unsigned long keyLocation, 
    in boolean ctrlKey, 
    in boolean altKey, 
    in boolean shiftKey, 
    in boolean metaKey); 

void initKeyboardEvent(
    in DOMString type, 
    in boolean canBubble, 
    in boolean cancelable, 
    in DOMWindow view, 
    in DOMString keyIdentifier, 
    in unsigned long keyLocation, 
    in boolean ctrlKey, 
    in boolean altKey, 
    in boolean shiftKey, 
    in boolean metaKey, 
    in boolean altGraphKey); 

readonly attribute boolean altGraphKey; 

readonly attribute boolean altKey; 

readonly attribute long charCode; 

readonly attribute boolean ctrlKey; 

const unsigned long KEY_LOCATION_LEFT = 0x01; 

const unsigned long KEY_LOCATION_NUMPAD = 0x03; 

const unsigned long KEY_LOCATION_RIGHT = 0x02; 

const unsigned long KEY_LOCATION_STANDARD = 0x00; 

readonly attribute long keyCode; 

readonly attribute DOMString keyIdentifier; 

readonly attribute unsigned long keyLocation; 

readonly attribute boolean metaKey; 

readonly attribute boolean shiftKey;