function abrir(pagina) {
	var LeftPosition = (screen.width) ? (screen.width-700)/2 : 0;
	var TopPosition = (screen.height) ? (screen.height-600)/2 : 0;

	var attTxt = "directories=no,height=600,width=700,top=" + TopPosition + ",left=" + LeftPosition +
				 ",location=no,menubar=no,resizable=no," +
				 "status=no,toolbar=no,scrollbars=yes";
	window.open("", "admin", attTxt);
}

function verGaleria() {
	//var LeftPosition = (screen.width) ? (screen.width-700)/2 : 0;
	//var TopPosition = (screen.height) ? (screen.height-600)/2 : 0;

	var attTxt = "directories=no,height=600,width=700,top=0,left=0" +
				 ",location=no,menubar=no,resizable=no," +
				 "status=no,toolbar=no,scrollbars=yes";
	window.open("galeria.php", "galeria", attTxt);
}