var map;
var layer_mapnik;
var layer_tah;
var layer_markers;

function drawmap() {
    // Popup und Popuptext mit evtl. Grafik
    var popuptext="<p style=\"\"><b>Zahnärzte Kant<br />Alexanderstraße 93<br />26121 Oldenburg<br />Telefon (0441) 883366</b></p>";

    OpenLayers.Lang.setCode('de');
    
    // Position und Zoomstufe der Karte
    var lon = 8.20958;
    var lat = 53.15446;
    var zoom = 15;

    map = new OpenLayers.Map('map', {
        projection: new OpenLayers.Projection("EPSG:900913"),
        displayProjection: new OpenLayers.Projection("EPSG:4326"),
        controls: [
            new OpenLayers.Control.MouseDefaults(),
            new OpenLayers.Control.LayerSwitcher(),
            new OpenLayers.Control.PanZoomBar()],
        maxExtent:
            new OpenLayers.Bounds(-20037508.34,-20037508.34,
                                    20037508.34, 20037508.34),
        numZoomLevels: 18,
        maxResolution: 156543,
        units: 'meters'
    });

    layer_mapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik");
    layer_markers = new OpenLayers.Layer.Markers("Address", { projection: new OpenLayers.Projection("EPSG:4326"), 
    	                                          visibility: true, displayInLayerSwitcher: false });

    map.addLayers([layer_mapnik, layer_markers]);
    jumpTo(lon, lat, zoom);
 
    // Position des Markers
    addMarker(layer_markers, 8.20958, 53.15446, popuptext);

}