GoogleMap on editperoperty.ascx

[uzmannazari]

hi
we need to change a javascript codes related to google map in editproperty.ascx file but i dont know anything about googlemap api v3. can anyone change this code to map v3?
<script type="text/javascript">

                function KeyDownHandler()
                {
                
                    // process only the Enter key
                    if (event.keyCode == 13)
                    {
                        alert(event.keyCode);
                        // cancel the default submit
                        event.returnValue=false;
                        event.cancel = true;
                        
                       showAddress(address.value);
                    }
                }

                function load() {
                    if (GBrowserIsCompatible()) {
                        var map = new GMap2(document.getElementById("map"));
                        map.addControl(new GSmallMapControl());
                        map.addControl(new GMapTypeControl());
                        
                        geocoder = new GClientGeocoder();
                        
                        <asp:literal id="litMapCenter" runat="server" />
                        <asp:placeholder id="phMapLoad" runat="server">
                        var marker = new GMarker(center, {draggable: true});  
                        map.addOverlay(marker);
                        document.getElementById("<%= txtLatitude.ClientID %>").value = center.lat().toFixed(5);
                        document.getElementById("<%= txtLongitude.ClientID %>").value = center.lng().toFixed(5);

                      GEvent.addListener(marker, "dragend", function() {
                       var point = marker.getPoint();
                          map.panTo(point);
                       document.getElementById("<%= txtLatitude.ClientID %>").innerHTML = point.lat().toFixed(5);
                       document.getElementById("<%= txtLongitude.ClientID %>").innerHTML = point.lng().toFixed(5);

                    });

                    GEvent.addListener(map, "moveend", function() {
                        map.clearOverlays();
                        var center = map.getCenter();
                        var marker = new GMarker(center, {draggable: true});
                        map.addOverlay(marker);
                        document.getElementById("<%= txtLatitude.ClientID %>").value = center.lat().toFixed(5);
                        document.getElementById("<%= txtLongitude.ClientID %>").value = center.lng().toFixed(5);

                        GEvent.addListener(marker, "dragend", function() {
                            var point =marker.getPoint();
                            map.panTo(point);
                            document.getElementById("<%= txtLatitude.ClientID %>").value = point.lat().toFixed(5);
                            document.getElementById("<%= txtLongitude.ClientID %>").value = point.lng().toFixed(5);
                        });
                    });

                        </asp:placeholder>
                  }
                }

                   function showAddress(address) {
                   var map = new GMap2(document.getElementById("map"));
                   map.addControl(new GSmallMapControl());
                   map.addControl(new GMapTypeControl());
                   if (geocoder) {
                    geocoder.getLatLng(
                      address,
                      function(point) {
                        if (!point) {
                          alert(address + " not found");
                        } else {
	                  document.getElementById("<%= txtLatitude.ClientID %>").value = point.lat().toFixed(5);
                   document.getElementById("<%= txtLongitude.ClientID %>").value = point.lng().toFixed(5);
	                 map.clearOverlays()
		                map.setCenter(point, 14);
               var marker = new GMarker(point, {draggable: true});  
	                 map.addOverlay(marker);

	                GEvent.addListener(marker, "dragend", function() {
                  var pt = marker.getPoint();
                     map.panTo(pt);
                  document.getElementById("<%= txtLatitude.ClientID %>").value = pt.lat().toFixed(5);
                     document.getElementById("<%= txtLongitude.ClientID %>").value = pt.lng().toFixed(5);
                    });


                 GEvent.addListener(map, "moveend", function() {
	                  map.clearOverlays();
                var center = map.getCenter();
	                  var marker = new GMarker(center, {draggable: true});
	                  map.addOverlay(marker);
	                  document.getElementById("<%= txtLatitude.ClientID %>").value = center.lat().toFixed(5);
                   document.getElementById("<%= txtLongitude.ClientID %>").value = center.lng().toFixed(5);

                 GEvent.addListener(marker, "dragend", function() {
                 var pt = marker.getPoint();
                    map.panTo(pt);
                document.getElementById("<%= txtLatitude.ClientID %>").value = pt.lat().toFixed(5);
                   document.getElementById("<%= txtLongitude.ClientID %>").value = pt.lng().toFixed(5);
                    });
             
                    });

                        }
                      }
                    );
                  }
                }
                
                if (window.addEventListener)
                {
                    window.addEventListener("load", load, false);
                    window.attachEvent("onunload", GUnload); 
                }
                else if (window.attachEvent)
                {
                    window.attachEvent("onload", load);
                    //window.addEventListener("unload", GUnload, false);
                }
                </script>