This property is only defined within a function body in a web browser. However some implementations may provide external arguments via this property.
Refer to the Arguments object topic for more details on how to access the caller and callee properties.
ECMA 262 edition 2 - section - 10.1.6
ECMA 262 edition 2 - section - 10.1.8
ECMA 262 edition 2 - section - 18.104.22.168
ECMA 262 edition 3 - section - 10.1.6
ECMA 262 edition 3 - section - 10.1.8