function popup(modus) {
	if ('suchanzeige' == modus) {
		ok = window.open("mietobjekte.php", "popup", "width=500,height=570,resizable=yes");
	} else {
		ok = window.open("popup.php", "popup", "width=500,height=470,resizable=yes");
	}
	if (ok) return false;
	else return true;
}