var addObjectResponse = [{ \'DateTimeTaken\': \'/Date(1301494335000-0400)/\', \'Weight\': 100909.090909091, \'Height\': 182.88, \'SPO2\': \'222.00000
I think that's not possible in JavaScript.
You can create an array which will contain the field names in your order and you can iterate through this array and fetch the fields from the actual object.