function openWin(pageName) {
	var winl = (screen.width - 940) / 2;
	var wint = (screen.height - 650) / 2;	
	var mainWindow = window.open(pageName,'mainWindow','width=400,height=743,top=' + wint + ',left=' + winl + ',location=no,directories=no,menubar=no,resizable=no,scrollbars=no,toolbar=no,status=no');
	mainWindow.focus();
}