Index: openacs-4/packages/acs-templating/tcl/head-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-templating/tcl/head-procs.tcl,v
diff -u -r1.20.2.5 -r1.20.2.6
--- openacs-4/packages/acs-templating/tcl/head-procs.tcl	12 Sep 2016 10:30:46 -0000	1.20.2.5
+++ openacs-4/packages/acs-templating/tcl/head-procs.tcl	13 Sep 2016 08:43:53 -0000	1.20.2.6
@@ -720,7 +720,7 @@
             append js [subst {
                 window.addEventListener('$event', function () {
                     [join $script { }]
-                });
+                }, false);
             }]
         }
         if {$js ne ""} {