function initialize() {
    var myLatlng = new google.maps.LatLng(latitude, longitude);
    var myOptions = {
      zoom: 15,
      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,
      title: Mtitle
  });
  
  var infowindow = new google.maps.InfoWindow({
    content: overlay
});
  
  
google.maps.event.addListener(marker, 'click', function() {
  infowindow.open(map,marker);
});  
  
  // To add the marker to the map, call setMap();
  marker.setMap(map);  
  }