function checkKontaktValues(){
	return checkFieldValues(window.document.forms["formKontakt"],
		new Array("name", "betreff", "text"),
		new Array("Name", "Betreff", "Text"));
}

function checkFieldValues(formular, arrFormFields, arrFieldNames) {
	answer = true;					
	emptyFields = "";
	for(var i = 0 ; i < arrFormFields.length ; ++i)
	{
		formular.elements[arrFormFields[i]].className = "eingabe_lang";		
		if(formular.elements[arrFormFields[i]].value == "")
		{
			answer = false;
			emptyFields += arrFieldNames[i] + ", ";
			formular.elements[arrFormFields[i]].className = "eingabe_lang_error";
		}	
	}
	
	if(answer == false)
	{
		emptyFields = emptyFields.substring(0, (emptyFields.length - 2));
		window.alert("Sie haben nicht alle nötigen Daten ausgefüllt:\n " + emptyFields + "!");
	}
	
	return answer;
}