function AbrirSinScroll( url, fullscreen,  scrollbars , alto, ancho   ) {

  if( alto == null || alto == 0 )
    alto = 230;
  if( ancho == null || ancho == 0)
    ancho = 360;

  if( fullscreen == null || fullscreen == 0 )
    fullscreen = "no";

   if( scrollbars == null || scrollbars == 0 )
    scrollbars = "no";
       
  izq = (screen.width - ancho) / 2;
  arr = ((screen.height - alto) / 2) - 15;
  
  if( fullscreen == "no"  )
    sFeatures = "fullscreen='no',width=" + ancho + ",height=" + alto + ",top=" + arr + ",left=" + izq+",scrollbars="+scrollbars;
  else
    sFeatures = "fullscreen='yes', scrollbars=yes";

  popupWin = window.open(url, "_blank", sFeatures, 0) ;
}