Tests whether this object has the specified property as a direct property.
Tests whether this object is in the prototype chain of another object.
Returns the numeric value corresponding to the current time - the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.
Parses a string representation of a date and returns the number of milliseconds since 1 January, 1970, 00:00:00, local time.
Tests whether the specified property in an object can be enumerated by a call to js.Object.properties, with the exception of properties inherited through the prototype chain.