How can i inilize

.aspx CODE :
<script src="http://maps.google.com/maps?file=api&amp;v=2&amp;key=<key>=false"
type="text/javascript"></script>
<script type="text/javascript">
var map;
function initialize() {
if (GBrowserIsCompatible()) {
map = new GMap2(document.getElementById("map"));

var lat =<asp:Literal ID="ltrLat" runat="server"/>;
var lng =<asp:Literal ID="ltrLng" runat="server"/>;

var center = new GLatLng(lat, lng);

map.setCenter(center, 10);
map.setUIToDefault();

var marker = new GMarker(center);
map.addOverlay(marker);
marker.openInfoWindow("Here");
}
}
</script>
<div id="map" style="width: 500px; height: 500px"></div>


.cs CODE:

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPo ...