anchor.diff:    }
   
     function zoomEvent() {
  -    var vis = map.getZoom() > 12;
  +    var vis = map.getZoom() > MIN_ZOOM_LEVEL;
       layerVector.setVisibility(vis);
       //document.getElementById("visstatus").style.visibility = vis ? "hidden" : "visible";
       if (!vis) {
  
positive.code: 
              layerVector.events.on({
                'loadend': function(obj) {
                  $("#visstatus").html($("#changeset_list_template").render(obj.object));
                  var bbox = map.getExtent().transform('EPSG:900913', 'EPSG:4326').toBBOX(8, false);
                  $("#rss_link").attr('href', '/map.rss?bbox=' + bbox);
                      }
                }
  
              );
        map.events.register("zoomend", this, zoomEvent);
  
negative.code:                  projection: new OpenLayers.Projection("EPSG:4326"),
                   displayProjection: new OpenLayers.Projection("EPSG:900913"),
                   styleMap: new OpenLayers.StyleMap({
                     "default": {'strokeWidth': 8, 'strokeColor': "yellow", 'strokeOpacity': 0.66},
                     "highlight": {'strokeWidth': 8, 'strokeColor': "blue"}
                   }),
                   visibility: false
              });
  