diff --git a/www/index.php b/www/index.php
index e9c668e..c99b4d6 100755
--- a/www/index.php
+++ b/www/index.php
@@ -346,7 +346,7 @@ if(isset($_GET['write_success'])){
         </th>
         </th>
         </p>
-        <p><input type="submit" class="w3-button w3-green w3-round-large" id="send" name="Send" value="Zkusme to"></p>
+        <p><input type="submit" disabled class="w3-button w3-green w3-round-large" id="send" name="Send" value="Zkusme to"></p>
       </form>
     </div>
   </div>