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;
        }
    };
};