google distance matrix API 3 - matrix

Question

I have code to calculate distance place to another place using google distance matrix API, but for free its limited just 100 elements per query. So I make code for solve the problem using looping code such as for elements , My code is PHP, javascript , and I parse latitude and longitude data from MySql. Anyone know some error of my code below ? because It don't appear anything if I click calculate button. Actualy I have modifie the code from this URL https://google-developers.appspot.com/maps/documentation/javascript/examples/distance-matrix , And this is my Code :
function hitung (){
service = new google.maps.DistanceMatrixService();
for (m = 0 ; m < l-80 ; m++ ){
asal = originarray[m];
for (n = 0 ; n < l-80 ; n++ ){
tujuan = destarray [n];
calculateDistances();
}
}
}
function calculateDistances() {
//var s = 0;
//for (m = 0 ; m < l-80 ; m++ ){
// asal = originarray[m];
//for (n = 0 ; n < l-80 ; n++ ){
//servicearray[s] = new google.maps.DistanceMatrixService();
//tujuan = destarray [n];
service.getDistanceMatrix(
{
//origins: [origin1, origin2],
// destinations: [destinationA, destinationB],
origins: asal,
destinations: tujuan,
//origins: originarray,
//destinations: destarray,
travelMode: google.maps.TravelMode.DRIVING,
unitSystem: google.maps.UnitSystem.METRIC,
avoidHighways: false,
avoidTolls: false
}, callback);
// s++;
//}
// }
}
function callback(response, status) {
if (status != google.maps.DistanceMatrixStatus.OK) {
alert('Error was: ' + status);
} else {
var origins = response.originAddresses;
var destinations = response.destinationAddresses;
var outputDiv = document.getElementById('outputDiv');
//outputDiv.innerHTML = '';
// deleteOverlays();
for (var i = 0; i < origins.length; i++) {
var results = response.rows[i].elements;
// addMarker(origins[i], false);
for (var j = 0; j < results.length; j++) {
// addMarker(destinations[j], true);
outputDiv.innerHTML += origins[i] + ' to ' + destinations[j]
+ ': ' + results[j].distance.text + ' in '
+ results[j].duration.text + '<br>';
}
}
}
}
function addMarker(location, isDestination) {
var icon;
if (isDestination) {
icon = destinationIcon;
} else {
icon = originIcon;
}
geocoder.geocode({'address': location}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
bounds.extend(results[0].geometry.location);
map.fitBounds(bounds);
var marker = new google.maps.Marker({
map: peta,
position: results[0].geometry.location,
icon: icon
});
markersArray.push(marker);
} else {
alert('Geocode was not successful for the following reason: '
+ status);
}
});
}
function deleteOverlays() {
if (markersArray) {
for (i in markersArray) {
markersArray[i].setMap(null);
}
markersArray.length = 0;
}
}
</script>

Answer 1

Check if you're receiving a response from Google by logging the response...
function callback(response, status) {
console.log(response);
}