function initialize() {
  var myLatlng = new google.maps.LatLng(52.36724, 4.889394);
  var myOptions = {
    zoom: 15,
    center: myLatlng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }

  var map = new google.maps.Map(document.getElementById("contactmap"), myOptions);

  var infowindow = new google.maps.InfoWindow({ content: '<h2>TERENA Secretariat</h2><div class="img-shadow_normal"><img src="/gfx/building_tiny.jpg" /></div><p>Singel 468 D<br /> NL-1017 AW Amsterdam<br /> Netherlands</p>' });

  var marker = new google.maps.Marker({
      position: myLatlng,
      map: map,
      title:"TERENA Office"
  });
  google.maps.event.addListener(marker, 'click', function() {
    infowindow.open(map,marker);
  });
}

window.onload = function() {
	initialize();
}