Go for a flash file to another

Hi, I need your help. My project has several flash files. What I do is that when I click on a button that takes me to another file on Frame I directed. This I want to do it once already been published files . And what I want is that when you open one closed above me , so that I should not remain many open windows at the same time. I do not know if there will be any easy way to do it. I’ve tried :

salir_btn.addEventListener ( MouseEvent.CLICK , salir ) ;
salir function ( evt : MouseEvent ) : void
{
navigateToURL (new URLRequest ( " 2.html "));

}

But the problem is that I will open the files in different windows and end up just having repeated windows. Could anyone help ?
Thank you very much , excuse my English .