function mapabus(divmapa,divselcat,contenido) {
      if (GBrowserIsCompatible()) {
        var mapg = new GMap2(document.getElementById(divmapa));
        mapg.setCenter(new GLatLng(41.5028,-5.74821), 15);
       /* mapg.addMapType(G_SATELLITE_3D_MAP);
        mapg.addControl(new GHierarchicalMapTypeControl());
        mapg.addControl(new GLargeMapControl());*/



        var idcat = document.getElementById(divselcat).value;

        GEvent.addListener(mapg, "dragend", function() {
          //mapg.clearOverlays(); 
          var center = mapg.getCenter();
          var r = 0.004;
          var la = center.lat();
          var lo = center.lng();
          //reller categoria por si cambio 
          idcat = document.getElementById(divselcat).value;  

          var url = 'http://www.zamora.es/cgi-bin/apsesp/zadir/buscar_directorio.php?turismo=1&r='+r+'&lat='+la+'&lng='+lo+'&idcategoria='+idcat;
         // update_div(url+'&plxslt=recurso.xslt',contenido);
          
          var geoXml;
          //alert(url+'&kml=1&plxslt=kml.xslt');
          geoXml = new GGeoXml(url+'&kml=1&plxslt=kml.xslt');
          
          enlaceKML(url+'&kml=1&plxslt=kml.xslt'); 
  
          if (window.listen) mapg.clearOverlays(); 
          window.listen=1;
          if (window.oldOver2) mapg.removeOverlay(window.oldOver2);  
          
          GEvent.addListener(geoXml,"load", function() { 
                   window.listen=0;
                   if(window.oldOver1) mapg.removeOverlay(oldOver1);
                   window.oldOver1=this;
          });
          mapg.addOverlay(geoXml);  

          var polyline = new GPolyline([
  	       new GLatLng(la+r, lo-r),
               new GLatLng(la+r, lo+r),
               new GLatLng(la-r, lo+r),
               new GLatLng(la-r, lo-r),
               new GLatLng(la+r, lo-r)
	   ], "#0000ff", 3);
	  mapg.addOverlay(polyline);
          window.oldOver2=polyline;
        });
  

 
      }
    }


    function enlaceKML(url){
       var l = document.getElementById('linkkml');
       l.href=url;
       l.style.display='inline';
       
    }