function enlarge(url) {
	var w = 770;
	var h = 500;
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;

	var win2;

	win2 = window.open(url, "popup", 'top=' + wint + ',left=' + winl + ',directories=no,toolbar=yes,location=no,scrollbars=yes,status=no,menubar=no,resizable=no,width=' + w + ',height=' + h);
	win2.focus();
}