Mover movie clip con funcion en boton

[Lynxcraft]

Código PHP:

  sumarY = 4; 
btn_mision_vision.onRelease = function() { 
 var p=false 
    contenedor.onEnterFrame = function() { 
        this._y += sumarY; 
        if (this._y>800) { 
            if(!p){ 
                p=true 
                this.onEnterFrame=null 
            } 
            sumarY = sumarY*-1; 
        } else if (this._y<5) { 
            sumarY = sumarY*-1; 
        } 
    }; 
};