function showMap()
{
var baseURL = "http://"+document.location.host+"/mapviewer";
var mapCenterLon = -122.45;
var mapCenterLat = 37.7706;
var mapZoom = 4;
var mpoint = MVSdoGeometry.createPoint(mapCenterLon,mapCenterLat,8307);
var mapview = new MVMapView(document.getElementById("map"), baseURL);
mapview.addMapTileLayer(new MVMapTileLayer("mvdemo.demo_map"));
mapview.setCenter(mpoint);
mapview.setZoomLevel(mapZoom);
mapview.display();
var mpolygon1 = MVSdoGeometry.createPolygon([-122.5,37.8,-122.45,37.85,-122.41,37.83],8307);
var foi1 = new MVFOI("1", mpolygon1, 'mvdemo.C.RED');
//whether you can click the foi, defaule is true
foi1.setClickable(true);
foi1.setInfoWindow("info window of FOI");
foi1.setInfoTip("infotip of FOI");
//foi1.enableInfoTip(false);
mapview.addFOI(foi1);
}