function checkRequiredFields(input)
{

    var requiredFields = new Array("edit_Kontakt_anrede",
    							   "edit_Kontakt_name",
                                   "edit_Kontakt_vorname",
                                   "edit_Kontakt_strasse",
                                   "edit_Kontakt_plz",
                                   "edit_Kontakt_ort",
                                   "edit_Kontakt_email");

    var fieldNames = new Array("Anrede",
    						   "Name",
                               "Vorname",
                               "Strasse",
                               "PLZ",
                               "Ort",
                               "E-Mail");
    var fieldCheck   = true;
    var fieldsNeeded = "\nIn diesem Formular müssen Sie alle Pflichtfelder ausfüllen!\nBitte füllen Sie folgende noch leere Felder aus:\n\n\t";

    for(var fieldNum=0; fieldNum < requiredFields.length; fieldNum++) {
        if ((input.elements[requiredFields[fieldNum]].value == "") ||
            (input.elements[requiredFields[fieldNum]].value == " ")) {

            fieldsNeeded += fieldNames[fieldNum] + "\n\t";
            fieldCheck = false;
        }
    }

    if (fieldCheck == true)
    {
        return true;
    }
    else
    {
        alert(fieldsNeeded);
        return false;
    }
}