function checkForm(kontakt_form,pflichtfelder,email_alert) {

    if ((kontakt_form.name.value == '') || (kontakt_form.strasse.value == '') || (kontakt_form.plz.value == '') || (kontakt_form.telefon.value == '') || (kontakt_form.email.value == '') || (kontakt_form.vorname.value == '') || (kontakt_form.land.value == '')){
        alert(unescape(pflichtfelder));
        return false;
    }
   

    return true;
}

function eMail(email){
    var a = false;
    var result = false;
    if(typeof(RegExp) == 'function'){
        var b = new RegExp('abc');
        if(b.test('abc') == true){a = true;}
    }    
    if(a == true){
        reg = new RegExp('^([a-zA-Z0-9\\-\\.\\_]+)'+
                         '(\\@)([a-zA-Z0-9\\-\\.]+)'+
                         '(\\.)([a-zA-Z]{2,4})$');
        result = (reg.test(email));
    }else{
        result = (email.search('@') >= 1 &&
                  email.lastIndexOf('.') > email.search('@') &&
                  email.lastIndexOf('.') >= email.length-5)
    }
    return(result);
}