无法使用 asp.net 获取服务器端的javascript返回的国家/地区名称

使用Google API，我在div中生成了国家名称。我无法在服务器端检索国家/地区名称。我无法检索字符串中的国家/地区名称请解决此问题。

<script src="http://maps.google.com/maps?hl=it&amp;file=api&amp;v=2&amp;sensor=true&amp;" type="text/javascript"></script>
<script type="text/javascript">
    var map;
    var geocoder;
    function addAddressToMap(response) {
        if (!response || response.Status.code != 200) {
            alert("Sorry, we were unable to geocode that address");
        }
        else {
            place = response.Placemark[0];
            point = new GLatLng(place.Point.coordinates[1], place.Point.coordinates[0]);
            document.getElementById('address').innerHTML = place.address;
            var str = place.address
            var a = str.lastIndexOf(",")
            a = a + 1
            var country = str.substring(a)
            document.getElementById('country').innerHTML = country

        }
    }

    function searchGeolocation() {
        if (navigator.geolocation) {
            navigator.geolocation.getCurrentPosition(function (position) {
                geocoder = new GClientGeocoder();
                document.getElementById('latitude').innerHTML = position.coords.latitude;
                document.getElementById('longitude').innerHTML = position.coords.longitude;
                coordinates = position.coords.latitude + "," + position.coords.longitude;
                geocoder.getLocations(coordinates, addAddressToMap);
            });
        } else {
            document.getElementById('latitude').innerHTML = "Unknown";
            document.getElementById('longitude').innerHTML = "Unknown";
            document.getElementById('address').innerHTML = "Unknown";
            alert("I'm sorry, but geolocation services are not supported by your browser.");
        }
    }
</script>
<div id="latitude">loading...</div>
    <script type="text/javascript">
        document.getElementById('latitude').style.display = 'none';
  </script>
 <div id="longitude">loading...</div>
    <script type="text/javascript">
        document.getElementById('longitude').style.display = 'none';
  </script>
 <div id="address">loading...</div>
    <script type="text/javascript">
        document.getElementById('address').style.display = 'none';
  </script>
 <div id="country" runat ="server" >loading...<br />
     <script type="text/javascript">
     searchGeolocation();
        </script>