if ((parseInt(navigator.appVersion) >= 4 )){
	 	xposition= (screen.width - 500) / 2;
		yposition = (screen.height - 235) / 2;
		}
	window.open('http://www.sanalfonso.cl/popups/popup_portada.php?html=67','popup67','width=500,height=235,scrollbars=no,resizable=yes,left=' + xposition + ',top=' + yposition );

	 if ((parseInt(navigator.appVersion) >= 4 )){
	 	xposition= (screen.width - 700) / 2;
		yposition = (screen.height - 512) / 2;
		}
	window.open('http://www.sanalfonso.cl/popups/popup_portada.php?html=69','popup69','width=700,height=512,scrollbars=no,resizable=yes,left=' + xposition + ',top=' + yposition );