Index: openacs-4/packages/xowiki/www/resources/chat-common.js
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/www/resources/Attic/chat-common.js,v
diff -u -N -r1.7 -r1.8
--- openacs-4/packages/xowiki/www/resources/chat-common.js	22 Nov 2018 09:15:37 -0000	1.7
+++ openacs-4/packages/xowiki/www/resources/chat-common.js	22 Nov 2018 13:10:27 -0000	1.8
@@ -28,9 +28,11 @@
         if (chat != null) {
             chat.id = 'xowiki-chat-fs';
             triggerFSlink.innerHTML = triggerFSoff;
+            document.body.style.overflow = "hidden";
         } else if (chatFS != null) {
             chatFS.id = 'xowiki-chat';
             triggerFSlink.innerHTML = triggerFSon;
+            document.body.style.overflow = "scroll";
         }
     });