function initialize() {

    var myLatlng = new google.maps.LatLng(51.52551344258957, -0.08546590805053711);
    var myOptions = {
        zoom: 7,
        center: myLatlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

    var marker = new google.maps.Marker({
        position: myLatlng,
        map: map
    });

}