zoomin = false;

function loadGoogleMap() {
  if (GBrowserIsCompatible()) {

    map = new GMap2(document.getElementById("map"));
    mapLoaded = 'true';
    map.setCenter(new GLatLng(51.141327, 3.418787), 16);
    map.setMapType(G_HYBRID_MAP);

    var markDeWijngaard23 = new GMarker(new GLatLng(51.141327, 3.418787));

    GEvent.addListener(markDeWijngaard23, "mouseover", function() {
        marker.openInfoWindowHtml("Hier gaan wij wonen!");
    });




   var encodedPolygon = new GPolygon.fromEncoded({
   polylines: [{
       color: "#FF0000",
       weight: 5,
       points: "}ocwHqvzSq@cAi@vAfAr@RiA",
       levels: "BBBBB",
       zoomFactor: 3,
       numLevels: 4
   }],
   fill: true,
   color: "#0000ff",
   opacity: 0.4,
   outline: true
   });

   map.addOverlay(encodedPolygon);
											           

     GEvent.addListener(map, "click", function() {
             if (zoomin) {
                   map.zoomIn();
             } else {
               map.zoomOut(); 
         }
            if ( map.getZoom() <9 ) {
                  zoomin = true;
            } 
            if (map.getZoom() > 15) {
                zoomin = false;
           }
      });
																					          
   } 
}