diff --git a/pfosten/resources/views/tipps/edit4.blade.php b/pfosten/resources/views/tipps/edit4.blade.php
index 2dea673b..d0f9d59e 100644
--- a/pfosten/resources/views/tipps/edit4.blade.php
+++ b/pfosten/resources/views/tipps/edit4.blade.php
@@ -98,7 +98,7 @@
 
                 <div class="form-group">
                     <p>&nbsp;</p>
-                    <button type="submit" class="btn btn-primary">Ok</button>
+                    <button type="submit" id="btn_submit" class="btn btn-primary">Ok</button>
                 </div>
 
             </form>
@@ -112,13 +112,15 @@
     let checkbox2=document.getElementById('joker_2')
     let checkbox3=document.getElementById('joker_3')
     let checkbox4=document.getElementById('joker_4')
+    let btn_submit=document.getElementById('btn_submit');
 
     if (checkbox1.checked==0 && checkbox2.checked==0 && checkbox3.checked==0 && checkbox4.checked==0) {
-        checkbox1.checked=1;
+        btn_submit.disabled=true;
     }
 
     checkbox1.addEventListener('change', function() {
         if (this.checked) {
+            btn_submit.disabled=false;
             checkbox2.checked=0;
             checkbox3.checked=0;
             checkbox4.checked=0;
@@ -131,6 +133,7 @@
 
     checkbox2.addEventListener('change', function() {
         if (this.checked) {
+            btn_submit.disabled=false;
             checkbox1.checked=0;
             checkbox3.checked=0;
             checkbox4.checked=0;
@@ -143,6 +146,7 @@
 
     checkbox3.addEventListener('change', function() {
         if (this.checked) {
+            btn_submit.disabled=false;
             checkbox1.checked=0;
             checkbox2.checked=0;
             checkbox4.checked=0;
@@ -154,6 +158,7 @@
     });
     checkbox4.addEventListener('change', function() {
         if (this.checked) {
+            btn_submit.disabled=false;
             checkbox1.checked=0;
             checkbox2.checked=0;
             checkbox3.checked=0;