function ventana (cual,altod, bar) {

	var ancho=((screen.width)/2)-233;
	
	var alto=((screen.height-16)/2)-(altod/2);
	
	window.open(cual,'','resizable=0,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=yes,width=466,height='+altod+',screenX='+ancho+',screenY='+alto+',left='+ancho+',top='+alto+'');
		
}

function ventana3 (cual,alto, ancho) {

	var anchod=((screen.width)/2)-(ancho/2);
	
	var altod=((screen.height-16)/2)-(alto/2);
	
	window.open(cual,'','resizable=0,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=yes,width='+ancho+',height='+alto+',screenX='+anchod+',screenY='+altod+',left='+anchod+',top='+altod+'');
		
}