Thanks for your reply .... it's not working .... here is the full code. Please tell me if i send you the .fla

import flash.events.MouseEvent;

import flash.display.Loader;

import flash.display.Sprite;

import flash.net.URLRequest;

stop();

btn_cerrar.visible = false;

//Listener para cada una de las variables

//Creacion de la variable cargador

var newMedia:Loader;

var cont:Sprite;

//Listener y funciones para boton cerrar, asi como la visibilidad

btn_cerrar.addEventListener(MouseEvent.CLICK, cerrar)

function cerrar(event:MouseEvent = null){

    btn_cerrar.visible = false;

     if (cont.contains(newMedia))

     {

         cont.removeChild(newMedia);

     }

     if (newMedia != null)

     {

         newMedia.unload();

     }

    newMedia = null;

}

//Boton Monteria

btn_monteria.addEventListener(MouseEvent.CLICK, montpress)

function montpress(Event:MouseEvent){

    //Crear una variable cargador para mostar el swf

    newMedia = new Loader;

    //Crear una variable para un clip vacio (anteriormente host)

    cont = new Sprite;

    //ruta para cargar la pelicula

    newMedia.load(new URLRequest("mapa_monteria.swf"));

    //mostar el boton cerrar

    btn_cerrar.visible = true;

    //Posicion x que va a tener el host

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Cucuta

btn_cucuta.addEventListener(MouseEvent.CLICK, cucpress)

function cucpress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_cucuta.swf"));

    btn_cerrar.visible = true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Santa Marta

btn_sta.addEventListener(MouseEvent.CLICK, stapress)

function stapress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_sta.swf"));

    btn_cerrar.visible = true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Villavicencio

btn_vll.addEventListener(MouseEvent.CLICK, villpress)

function villpress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_villavicencio.swf"));

    btn_cerrar.visible=true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Cartagena

btn_ctg.addEventListener(MouseEvent.CLICK, ctgpress)

function ctgpress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_cartagena.swf"));

    btn_cerrar.visible=true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Bogota

btn_bogota.addEventListener(MouseEvent.CLICK, bogpress)

function bogpress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_bogota.swf"));

    btn_cerrar.visible=true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Cali

btn_cali.addEventListener(MouseEvent.CLICK, calipress)

function calipress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_cali.swf"));

    btn_cerrar.visible=true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Barranquilla

btn_bll.addEventListener(MouseEvent.CLICK, bllpress)

function bllpress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_barranquilla.swf"));

    btn_cerrar.visible=true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Medellin

btn_mdll.addEventListener(MouseEvent.CLICK, mllpress)

function mllpress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_medellin.swf"));

    btn_cerrar.visible = true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Dosquebradas

btn_dq.addEventListener(MouseEvent.CLICK, dqpress)

function dqpress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_dosquebradas.swf"));

    btn_cerrar.visible = true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Ibague

btn_ibague.addEventListener(MouseEvent.CLICK, ibgpress)

function ibgpress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_ibague.swf"));

    btn_cerrar.visible = true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

//Boton Tunja

btn_tunja.addEventListener(MouseEvent.CLICK, tunjapress)

function tunjapress(Event:MouseEvent){

    newMedia = new Loader;

    cont = new Sprite;

    newMedia.load(new URLRequest("mapa_tunja.swf"));

    btn_cerrar.visible = true;

    cont.x = 10;

    cont.y = 120;

    stage.addChild(cont);

    stage.addChild(btn_cerrar);

    cont.addChild(newMedia);

}

Hi ... i was busy for a long time, so that's why i can't  uset it ...

this is the function cerrar:

btn_cerrar.addEventListener(MouseEvent.CLICK, cerrar)

function cerrar(event:MouseEvent = null){

    btn_cerrar.visible = false;

     if (cont.contains(newMedia))

     {

         cont.removeChild(newMedia);

     }

     if (newMedia != null)

     {

         newMedia.unload();

     }

    newMedia = null;

}

But how do i call it from each button??? ...

Thanks a lot .... you can seet here how its working