{
       "results" : [
          {
             "address_components" : [
                {
                   "long_name" : "Kolkata",
                   "short_name" : "Kolkata",
                   "types" : [ "locality", "political" ]
                },
                {
                   "long_name" : "Kolkata",
                   "short_name" : "Kolkata",
                   "types" : [ "administrative_area_level_2", "political" ]
                },
                {
                   "long_name" : "West Bengal",
                   "short_name" : "WB",
                   "types" : [ "administrative_area_level_1", "political" ]
                },
                {
                   "long_name" : "India",
                   "short_name" : "IN",
                   "types" : [ "country", "political" ]
                }
             ],
             "formatted_address" : "Kolkata, West Bengal, India",
             "geometry" : {
                "bounds" : {
                   "northeast" : {
                      "lat" : 23.0078201,
                      "lng" : 88.5428696
                   },
                   "southwest" : {
                      "lat" : 22.3436288,
                      "lng" : 88.19430439999999
                   }
                },
                "location" : {
                   "lat" : 22.572646,
                   "lng" : 88.36389500000001
                },
                "location_type" : "APPROXIMATE",
                "viewport" : {
                   "northeast" : {
                      "lat" : 23.0078201,
                      "lng" : 88.5428696
                   },
                   "southwest" : {
                      "lat" : 22.3436288,
                      "lng" : 88.19430439999999
                   }
                }
             },
             "place_id" : "ChIJZ_YISduC-DkRvCxsj-Yw40M",
             "types" : [ "locality", "political" ]
          }
       ],
       "status" : "OK"
    }

$(function() {
    $("#home_city_select").change(function() {
        //alert( $('option:selected', this).text() );
        var city = document.getElementById("home_city_select").value;
        var ltd;
        var lng;

        var jsonLtdLng="https://maps.googleapis.com/maps/api/geocode/json?address="+city+"&key=API_KEY";
        //alert(JSON.stringify(jsonLtdLng));
        //alert($.getJSON(jsonLtdLng));
        //alert($.getJSON(jsonLtdLng.lat));
        //alert($.getJSON(jsonLtdLng.results.geometry.location.lat));
        //alert($.getJSON(jsonLtdLng.results[0].geometry.location.lat));
        //alert($.getJSON(jsonLtdLng.results[0].geometry.location.lat()));
        alert(jsonLtdLng.results[0].geometry.location.lat());
    });
});