function initialize() {
  var latlng = new google.maps.LatLng(52.141000, 5.425666);
  var myOptions = {
    zoom: 14,
    center: latlng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };
  var map = new google.maps.Map(document.getElementById("map_canvas"),
      myOptions);
  
  var image = 'images/arrow_maps.png';
  
  var marker = new google.maps.Marker({
    clickable: false,
    position: latlng,
    map: map,
    title:"HTR Automatisering",
    icon: image
  }); 
}