用wrapper封装这样在对象内外都可以访问

 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);
 }
}