function info(inhalt,breite,hoehe)
{
        fenster_info = window.open(inhalt,"Info","width=" + breite + ",height=" + hoehe + ",left=0,top=0,resizable=yes, scrollbars=yes");
        fenster_info.focus();
}

function pruefe_mbm(mbm,menge)
{
	if (menge > 0 && mbm > menge)
	{
		fenster_fehler = info('error_mbm.php?mbm=' + mbm, '400', '300');
		return false;
	}
	return true;
}