function ventanacalidad()
{
	w=400;
	h=200;

    LeftPosition = ( window.screen.width - w )/2;
  	TopPosition = (window.screen.height - h)/2;
	seteo ="resizable=yes,menubar=no,location=no,toolbar=no,status=no,scrollbars=no,directories=no,width=400,height=200,top = "+ TopPosition +" ,left=" + LeftPosition;
	window.open ("/internet/calidad/login.asp","_blank", seteo);
}