var starttexthtml = '<div id="googletooltip">Dehua Touristic GmbH<br />Klosterwall 4, B/C<br />20095 Hamburg</div>';

function anfahrtkarte() {
  if (GBrowserIsCompatible()) {
	var map = new GMap2(document.getElementById("map"));
	map.setCenter(new GLatLng(53.54894,10.00570), 15);
  	//Navigation festlegen
	map.addControl(new GLargeMapControl());
	map.addControl(new GMapTypeControl());
	//map.setMapType(G_SATELLITE_MAP);
	//map.addControl(new GOverviewMapControl()); //Uebersichtskarte
	//Marker einbinden
	var point = new GLatLng(53.54894,10.00570);
	var firmaMarker = new GMarker(point);
	map.addOverlay(firmaMarker);
	GEvent.addListener(firmaMarker, "click", function() {
		firmaMarker.openInfoWindowHtml(starttexthtml);
													  });
	// INFO Window
	map.openInfoWindowHtml(map.getCenter(), (starttexthtml));
  } else {
	  alert("Klosterwall 4, B/C, 20095 Hamburg");
  }
  
}