Google Maps DistanceMatrix callback - google-maps-api-3

Question

I am using Google Maps Distance Matrix and what I need is two different distances,
at the moment I have the following:-
var start = arrObjLatLngs[0];
var end = arrObjLatLngs[arrObjLatLngs.length - 1];
var base = new google.maps.LatLng(52.781048888889, -1.2110222222222546);
var service = new google.maps.DistanceMatrixService();
service.getDistanceMatrix(
{
origins: [base],
destinations: [start, end],
travelMode: google.maps.TravelMode.DRIVING,
unitSystem: google.maps.DirectionsUnitSystem.METRIC,
avoidHighways: false,
avoidTolls: false
}, callback);
function callback(response, status) {
if (status == google.maps.DistanceMatrixStatus.OK) {
var origins = response.originAddresses;
var destinations = response.destinationAddresses;
for (var i = 0; i < origins.length; i++) {
var results = response.rows[i].elements;
for (var j = 0; j < results.length; j++) {
var element = results[j];
var distance = Math.round(parseFloat(element.distance.text));
alert(distance);
var duration = element.duration.text;
var from = origins[i];
var to = destinations[j];
}
}
}
}
When I alert($distance); I get two responses, e.g. 15 and 10
What I need is two seperate values, i.e. if I alert($runinPickup); I get 15 , if I alert alert($runinDestination); I get 10.
I thought they were in an array so I have tried alert(distance[0]) but this comes back as undefined.
Do I have to do two seperate getDistanceMatrix requests or is there a way to seperate the two values?