function popupGuestbook(mode) {
	window.open('http://www.powweb.com/plugin/Guestbook.bml?account=pow.roryhewitt&mode=' + mode,'mywindow', 'toolbar=no,location=no,directories=no,status=no, menubar=no, scrollbars=yes,resizable=yes,copyhistory=no,width=500,height=350');
}