;(function($){

    $(document).ready(function(){
        var euCountries = [21,33,57,81,67,72,73,84,103,105,117,123,124,132,150,14,170,171,175,203,189,190,195,56,97,222,55];

        var $vatInput = $('input[name="vat"]');
        var $companyInput = $('input[name="company"]');
        var $countrySelect = $('select[name="country"]');

        if($vatInput.length > 0){
            var $form = $vatInput.closest('form');
            $form.submit(function(){
                if($companyInput.val().length > 0 && $vatInput.val().length == 0 && $.inArray(Number($countrySelect.val()),euCountries) > -1){
                    alert('Bitte geben Sie die Umsatzsteuer ID Nummer ein.');
                    return false;
                }
            });
        }
    });
})(jQuery);