function initialize() {
    var startLatLng = new google.maps.LatLng(52.449288, 13.294616);
    var map = new google.maps.Map(document.getElementById("map_container"), {
        zoom:       14,
        center:     startLatLng,
        mapTypeId:  google.maps.MapTypeId.ROADMAP
    });
    var marker = new google.maps.Marker({
        position:   startLatLng,
        map:        map,
    });
}