function popUpAnuario () {
	ancho = (screen.width-800)/2;
	alto = (screen.height-600)/2;
	window.open("anuario.html","anuario","toolbar=NO,location=NO,directories=NO,channelmode=NO,menubar=NO,status=NO,scrollbars=NO,resizable=NO,width=800,height=600,left="+ancho+",top="+alto );
}