diff --git a/templates/invoice.html b/templates/invoice.html
index 0fc7d5e..f3a9d8f 100644
--- a/templates/invoice.html
+++ b/templates/invoice.html
@@ -40,7 +40,7 @@
             <div class="row justify-content-center">
                 <div class="col-lg-8">
 
-                    <form method="POST" action="{{ url_for('invoice_pdf') }}" target="_blank">
+                    <form method="POST" action="{{ url_for('invoice_pdf') }}" target="_blank" onchange="scheduleSave()" onkeyup="scheduleSave()">
 
                         <div class="card mb-3">
                             <div class="card-header"><i class="ti ti-user me-2"></i>Rechnungsdaten</div>
@@ -48,19 +48,19 @@
                                 <div class="row g-3">
                                     <div class="col-md-6">
                                         <label class="form-label">Rechnungsnummer</label>
-                                        <input type="text" class="form-control" name="rechnungsnummer" value="{{ config.rechnungsnummer }}">
+                                        <input type="text" class="form-control" name="rechnungsnummer" data-var="rechnungsnummer" value="{{ config.rechnungsnummer }}">
                                     </div>
                                     <div class="col-md-6">
                                         <label class="form-label">Datum</label>
-                                        <input type="text" class="form-control" name="datum" value="{{ config.datum }}">
+                                        <input type="text" class="form-control" name="datum" data-var="datum" value="{{ config.datum }}">
                                     </div>
                                     <div class="col-12">
                                         <label class="form-label">Kundenname</label>
-                                        <input type="text" class="form-control" name="kundenName" value="{{ config.kundenName }}">
+                                        <input type="text" class="form-control" name="kundenName" data-var="kundenName" value="{{ config.kundenName }}">
                                     </div>
                                     <div class="col-12">
                                         <label class="form-label">Kundenadresse</label>
-                                        <textarea class="form-control" name="kundenAdresse" rows="3">{{ config.kundenAdresse }}</textarea>
+                                        <textarea class="form-control" name="kundenAdresse" data-var="kundenAdresse" rows="3">{{ config.kundenAdresse }}</textarea>
                                     </div>
                                 </div>
                             </div>
@@ -103,5 +103,6 @@ Vielen Dank fur Ihren Auftrag!</div>
     </div>
 
     <script src="https://cdn.jsdelivr.net/npm/@tabler/core@latest/dist/js/tabler.min.js"></script>
+    <script src="{{ url_for('static', filename='script.js') }}"></script>
 </body>
 </html>