I want to show google map integration with .net web application. when I give latitude and longitude values from database.

<script src="http://maps.google.com/maps?file=api&v=2&key=AIzaSyDBO2QQj003uS59ixG2h5QBHmIv7BTBU4Y&sensor=false">
       type="text/javascript"></script>
   <script type="text/javascript">
       var map;
       var geocoder;
       var address;

       $(document).ready(function () {
           initialize();
       });

       function initialize() {
           if (GBrowserIsCompatible()) {  // does browser support  Google Maps APIMaps API
               map = new GMap2(document.getElementById("map"));
               map.setCenter(new GLatLng(17, 83), 5);
               map.setUIToDefault();
           }
           findAddress();
       }

       function showAddress(addresess) {
           geocoder = new GClientGeocoder();
           // get GLatLng point for the given address
           geocoder.getLatLng(
               address,   // address to look for
               function (point) {  // call back function to process the result
                   if (!point) {  // if address not found
                       alert("Sorry the given address [" + address + "] was not found!");
                   }
                   else {
                       //  point contains the required Latitude and Longitude
                       map.setCenter(point, 15);  // point map to the given
                       var marker = new GMarker(point);
                       map.addOverlay(marker);   // display a marker at the point in the map
                       marker.openInfoWindow(address);  // show address in a window
                   }
               }
           );
       }

       function findAddress() {
           var ddl = document.newGetElementById("ddlLocations");
           address = ddl.options[ddl.selectedIndex].value;  // get selected address from dropdownlist
           showAddress(address);
           return false;   // avoid postback
       }
   </script>

<asp:dropdownlist id="ddlLocations" runat="server" xmlns:asp="#unknown">
    </asp:dropdownlist>
    <asp:button id="btnGetAddress" runat="server" text="Get Address" onclientclick="return findAddress()" xmlns:asp="#unknown" />
    <p />
    <div id="map" style="width: 800px; height: 600px">
    </div>