function initialize() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("map_canvas"));
	map.addControl(new GSmallMapControl());
	map.addControl(new GMapTypeControl());
        map.setCenter(new GLatLng(51.44473,5.620708), 14);
	var point = new GLatLng(51.444211,5.620563);
	var marker = new GMarker(point);
	GEvent.addListener(marker, "click", function() {  
		marker.openInfoWindowHtml("<p><b>Praktijk Marij Nuij</b></p><p>Marktstraat2</p><p>5731HW Mierlo</p>");  });
	map.addOverlay(marker);
       }
    }