function MapPool(){  function createMarker(name, lat, lng, state){   var marker = new AMap.Marker({    position : new AMap.LngLat(lng, lat),         });   //the function mapMoveTo is not accessible here too         AMap.event.addListener(marker, "click",function(e){    //moveMapTo(key, name, state)    //or this.moveMapTo(key, name, state) will raise a unresolved function error    //you should write wrapper function as a member variable             _mapMoveTo(key, name, state);         });  }  var _mapMoveTo = function(key, name, state){   //TODO  }  this.mapMoveTo = function(key, name, state) {   _mapMoveTo(key, name, state);  } }