// Ventana POP.
function subWin(loc, nom, ancho, alto, posx, posy) {
  var options="toolbar=0,status=0,menubar=0,scrollbars=1,resizable=0,location=0,directories=0,width=" + ancho + ",height=" + alto;
      
  win = window.open(loc, nom, options);                 
  win.focus();
  if ( (posx > 0) && (posy > 0) ) {
    win.moveTo(posx, posy);
  };
};