function check_kat(language) {
	var fehler = 0;
	if (document.forms.katform.firmenname.value == '' ||
		document.forms.katform.name.value == '' ||
		document.forms.katform.strasse.value == '' ||
		document.forms.katform.plz.value == '' ||
		document.forms.katform.ort.value == '' ||
		document.forms.katform.land.value == '' ||
		(document.forms.katform.anrede[0].checked === false && document.forms.katform.anrede[1].checked === false)
		) {
		fehler = 1;
	}
	if (fehler == 1) {
		if (language == 'de') {
			alert(unescape('Bitte f%FCllen Sie alle mit * gekennzeichneten Pflichtfelder aus.'));
		} else {
			alert('Please fill all mandatory fields.');
		}
		return false;
	} else {
		return true;
	}
}