From f8fff60be1abb9986486cc7367747ee16d829116 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Bernd=20Ble=C3=9Fmann?= <bernd@kivitendo-premium.de>
Date: Wed, 13 Apr 2022 16:25:27 +0200
Subject: [PATCH] =?utf8?q?Rechnungsmaske:=20Browser-Zur=C3=BCck=20verhinde?=
 =?utf8?q?rn?=
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Ein weiterer Hack, der in der Rechnungsmaske den Browswer-Zurück-Knopf
aushebeln soll, damit nicht doppelt gebucht werden kann.

siehe auch:
https://stackoverflow.com/questions/46183325/prevent-form-resubmit-after-pressing-back-button
---
 templates/webpages/is/form_header.html | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/templates/webpages/is/form_header.html b/templates/webpages/is/form_header.html
index b155850ab..4c3e738f7 100644
--- a/templates/webpages/is/form_header.html
+++ b/templates/webpages/is/form_header.html
@@ -326,6 +326,10 @@
   <script type="text/javascript">
    <!--
      $('document').ready(function(){
+       function disableBack() { window.history.forward() };
+       window.onload = disableBack();
+       window.onpageshow = function(evt) { if (evt.persisted) disableBack() };
+
 [% IF resubmit && is_format_html %]
        window.open('about:blank','Beleg');
        document.invoice.target = 'Beleg';
-- 
2.20.1