iterating through a javascript object in order

Here's the situation. I have a JavaScript object and I need to iterate through it, but the order is very important to maintain. I know that JavaScript object is supposed to be unordered, but I was hoping there was some JavaScript equivalent to the following: http://docs.python.org/2/library/collections.html#collections.OrderedDict

This is the original ordering

{
  082013: {'A': 1, 'B', 3}
  092013: {'A': 2, 'B', 4}
  102013: {'A': 8, 'B', 2}
  112013: {'A': 92, 'B', 67}
  122013: {'A': 64, 'B', 32}
}

Then I iterate through it:

aArray = [];
bArray = [];
$.each(data, function(key, value) {
   aArray.push(value.A);
   bArray.push(value.B);
});

the result (on chrome in particular) seems to render more like this:

aArray = [8, 92, 64, 1, 2];
bArray = [2, 67, 32, 3, 4];

This implies that it does not iterate in order, or goes through it in the order of smallest to largest (102013, 112013, 122013, 092013, 082013)

So how could I iterate this object in order, if I can at all?