Geocoder - No map available

In the html sourcecode I see the latitude , so why doesn't the map show ??

<!-- STEP1: Map with single address: Put this in the <head> of your page, rename $record if needed --> <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script> <script type="text/javascript"> function initialize() { var latitude = 50.86982; var longitude = 4.68428; var mapCanvasId = 'map_canvas'; if (latitude) { var mapOptions = { mapTypeId: google.maps.MapTypeId.ROADMAP }; var map = new google.maps.Map(document.getElementById(mapCanvasId), mapOptions); var latLng = new google.maps.LatLng(latitude, longitude); var marker = new google.maps.Marker({map: map, position: latLng });
map.setCenter(latLng); map.setZoom(14); } } </script> <!-- /STEP1: Map with single address -->

Got it working now, somehow... thx after all.