public function Calendar($action)
 {
     if (isset($action)) {
         if ($action == "create") {
             $evento = Eventos::firstOrCreate(Input::all());
             foreach ($evento->areas() as $area) {
                 $evento->area .= $area->nombre . ",";
             }
             return $respuesta = array('Record' => $evento, 'Result' => "OK");
         }
         if ($action == "edit") {
             $evento = Eventos::find(Input::get("id"));
             $evento->fill(Input::all());
             $evento->save();
             foreach ($evento->areas() as $area) {
                 $evento->area .= $area->nombre . ",";
             }
             return $respuesta = array('Record' => $evento, 'Result' => "OK");
         }
         if ($action == "remove") {
             Eventos::where('id', Input::get("id"))->delete();
             return '{"Result":"OK"}';
         }
         if ($action == "list") {
             $Records = Eventos::get();
             $Records->each(function ($evento) {
                 foreach ($evento->areas() as $area) {
                     $evento->area .= $area->nombre . ",";
                 }
             });
             $respuesta = array('Records' => $Records, 'Result' => "OK");
             return json_encode($respuesta);
         }
         if ($action == "areas") {
             $nulos = DB::table('areas')->select(DB::raw("'Ninguna' as DisplayText,'null' as value"));
             $respuesta = Areas::select("nombre as DisplayText", "id as Value")->union($nulos)->orderby('value', 'asc')->distinct()->get();
             return "var opciones=" . json_encode($respuesta);
         }
     }
 }