		AsBoolean (TJSValue)
		AsCompletion (TJSValue)
		AsNumber (TJSValue)
		AsObject (TJSValue)
		AsReference (TJSValue)
		AsString (TJSValue)
		CustomValue (TJSValue)
		IsNull (TJSValue)
		IsUndefined (TJSValue)
	ro	ValueType (TJSValue)