function SubmitKontaktForm ( FormTagId, MessageTagId, successMsg, failedMsg ) {
        advAJAX.submit(document.getElementById( FormTagId ), {
            onSuccess : function(obj) {

                 if( obj.responseText == 'mail_send' ) {
                     document.getElementById( 'kontakt_imie_naziwsko' ).value = '';
                     document.getElementById( 'kontakt_email' ).value = '';
                     document.getElementById( 'kontakt_firma' ).value = '';
                     document.getElementById( 'kontakt_telefon' ).value = '';
                     document.getElementById( 'kontakt_tresc' ).value = '';
                     document.getElementById( 'kontakt_dzial' ).value = 'marketing';
                     document.getElementById( MessageTagId ).innerHTML = successMsg;
                 }
                 else if( obj.responseText == 'mail_not_send' ) {
                     document.getElementById( MessageTagId ).innerHTML = failedMsg;  
                 }
                 else
                    document.getElementById( MessageTagId ).innerHTML = obj.responseText;

             },
            onError : function(obj) { alert("Error: " + obj.status); }
        });

    }