rem: gDBView.reloadMessage(); 
add: gDBView.loadMessageByUrl("about:blank"); gDBView.selectionChanged(); 
context: function ChangeMessagePaneVisibility(now_hidden){  // we also have to hide the File/Attachments menuitem  var node = document.getElementById("fileAttachmentMenu");  if (node)    node.hidden = now_hidden;  if (gDBView) {    // clear the subject, collapsing won't automatically do this    setTitleFromFolder(GetThreadPaneFolder(), null);    // the collapsed state is the state after we released the mouse     // so we take it as it is    gDBView.suppressMsgDisplay = now_hidden;    // set the subject, uncollapsing won't automatically do this    gDBView.reloadMessage();  }  var event = document.createEvent('Events');  if (now_hidden) {    event.initEvent('messagepane-hide', false, true);  }  else {    event.initEvent('messagepane-unhide', false, true);  }  document.getElementById("messengerWindow").dispatchEvent(event);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/11af63296339c57a188fc54207fc7bf32f8fe49d/commandglue.js/clean/mailnews/base/resources/content/commandglue.js