Question

My only question is, if browser does not support cross domain AJAX request than How google map api works to get the data.

How following code works ?

<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
geocoder = new google.maps.Geocoder();
geocoder.geocode( { 'address': address}, function(results, status) {
   if (status == google.maps.GeocoderStatus.OK) {
   }
});
</script>

what geocoder.geocode does internally ?

EDIT:
Ok they are including http://maps.gstatic.com/intl/en_us/mapfiles/api-3/9/8/main.js

can anyone tell me where they are using JSONP in their JS Code ?

Answer 1

It most likely uses JSONp, i.e. it includes a script from the google servers that calls a callback function and passes the response to that function.