Index: openacs-4/packages/acs-bootstrap-installer/installer/install.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-bootstrap-installer/installer/install.tcl,v
diff -u -r1.12.2.2 -r1.12.2.3
--- openacs-4/packages/acs-bootstrap-installer/installer/install.tcl	13 Sep 2016 10:56:28 -0000	1.12.2.2
+++ openacs-4/packages/acs-bootstrap-installer/installer/install.tcl	2 Dec 2016 13:35:31 -0000	1.12.2.3
@@ -22,7 +22,7 @@
 if {$password ne $password_confirmation  } {
     install_return 200 "Passwords Don't Match" [subst {
 The passwords you've entered don't match. 
-Please <a href="#" onClick="history.back();return false;">try again</a>.
+Please <a class="back-buttons" href="#">try again</a>.
     }]
     return
 }
@@ -103,7 +103,7 @@
 	install_return 200 "Unable to Create Administrator" [subst {
 Unable to create the site-wide administrator:
 <blockquote><pre>[ns_quotehtml $::errorInfo]</pre></blockquote>
-Please <a href="#" onClick="history.back();return false;">try again</a>.
+Please <a class="back-buttons" href="#">try again</a>.
 }
         return
     }
@@ -200,6 +200,18 @@
 <p> When the server is back up you can visit <a href=\"/acs-admin/\">the site-wide administration pages</a> </p>"
 }
 
+ns_write [subst {
+   <script type='text/javascript' nonce='$::__csp_nonce'>
+     var elems = document.getElementsByClassName('back-buttons');
+     for (var i = 0, l = elems.length; i < l; i++) {
+        elems\[i\].addEventListener('click', function (event) {
+           event.preventDefault();
+           history.back();
+        }, false);
+     }
+   </script>
+}]
+
 ns_write [install_footer]
 
 # Local variables: