function open_win(w)
{
  var _height = screen.height - 30 - 30 - 25 - 25; // 30:barra de tarefas / 30:barra de titulos / 25: barra de endereços / 25:barra de status 
  var iSpring = 0; // espaço ocupado pela barra do iSpring
  if ((w.indexOf("Materias/Constitucional") == -1) &&
      (w.indexOf("Materias/Administrativo") == -1) &&
      (w.indexOf("Materias/Tributario") == -1) &&
      (w.indexOf("Materias/Penal") == -1))
  {
    iSpring = 35; 
  }
  
  var _width = (_height - iSpring) * 1.33; 
  var _top = "0px";
  var _left = (screen.width - _width) / 2;

  window.open(w, "nome_janela", "directories=no, height=" + _height + ", width=" + _width + ", left=" + _left + ", top=" + _top + ", location=no, menubar=no, resizable=yes, scrollbars=no, status=no, toolbar=no")

}

function open_win2(w)
{
  var _height = screen.height - 30 - 30 - 25 - 25; // 30:barra de tarefas / 30:barra de titulos / 25: barra de endereços / 25:barra de status 
  var iSpring = 0; // espaço ocupado pela barra do iSpring
  if ((w.indexOf("Materias/Constitucional") == -1) &&
      (w.indexOf("Materias/Administrativo") == -1) &&
      (w.indexOf("Materias/Tributario") == -1) &&
      (w.indexOf("Materias/Penal") == -1))
  {
    iSpring = 35; 
  }
  
  var _width = (_height - iSpring) * 1.33; 
  var _top = "0px";
  var _left = (screen.width - _width) / 2;

  window.open(w, "nome_janela", "directories=no, height=" + _height + ", width=" + _width + ", left=" + _left + ", top=" + _top + ", location=no, menubar=yes, resizable=yes, scrollbars=yes, status=no, toolbar=no")
}