function initialize() { 
      if (GBrowserIsCompatible()) {

        var blueIcon = new GIcon(G_DEFAULT_ICON);
        blueIcon.image = "http://www.bluefevermedia.com/img/blue-dot.png";
        blueIcon.iconSize = new GSize(37, 33);
        blueIcon.iconAnchor = new GPoint(15, 16);
        blueIcon.shadow = ""; 

markerOptions = {icon:blueIcon};

        var map = new GMap2(document.getElementById("map_canvas"));
        map.setCenter(new GLatLng(37.4419, -122.1419), 15);
        map.addControl(new GMapTypeControl());	

var marker = new GMarker(new GLatLng(-34.563926,-58.442185), markerOptions);
        map.setCenter(new GLatLng(-34.563926,-58.442185), 15);
        map.addControl(new GSmallZoomControl()); 
        map.addOverlay(marker);
        map.checkResize(); 
      }
    }