function initialize() {
    var myLatlng = new google.maps.LatLng(50.718276, -1.965483);
    var myOptions = {
    zoom: 13,
    center: myLatlng,
    mapTypeId: google.maps.MapTypeId.HYBRID
  }
  var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
  var image = 'images/park-urban.png';
  var parkMarker = new google.maps.Marker({ position: myLatlng, map: map, icon: image });
  }

  function loadScript() {
    var script = document.createElement("script");
    script.type = "text/javascript";
    script.src = "http://maps.google.com/maps/api/js?sensor=false&callback=initialize";
    document.body.appendChild(script);
  }
  window.onload = loadScript;