inputX: E1('#chat-input-field-x'),
        input1: E1('#chat-input-field-single'),
        inputM: E1('#chat-input-field-multi'),
        inputFile: E1('#chat-input-file'),
        contentDiv: E1('div.content'),
        viewConfig: E1('#chat-config'),
        viewPreview: E1('#chat-preview'),
        viewSearch: E1('#chat-search'),
        previewContent: E1('#chat-preview-content'),
        btnPreview: E1('#chat-button-preview'),
        views: document.querySelectorAll('.chat-view'),
        activeUserListWrapper: E1('#chat-user-list-wrapper'),
        activeUserList: E1('#chat-user-list')
      },
      me: F.user.name,

      ev.preventDefault();
      ev.stopPropagation();
      Chat.setCurrentView(Chat.e.currentView===Chat.e.viewConfig
                          ? Chat.e.viewMessages : Chat.e.viewConfig);
      return false;
    };
    D.attr(settingsButton, 'role', 'button').addEventListener('click', cbToggle, false);
    Chat.e.viewConfig.querySelector('button.action-close').addEventListener('click', cbToggle, false);

    /** Internal acrobatics to allow certain settings toggles to access
        related toggles. */
    const namedOptions = {
      activeUsers:{
        label: "Show active users list",
        hint: "List users who have messages in the currently-loaded chat history.",

      if(op.persistentSetting){
        Chat.settings.addListener(
          op.persistentSetting,
          function(setting){
            if(op.checkbox) op.checkbox.checked = !!setting.value;
            else if(op.select) op.select.value = setting.value;
            if(op.callback) op.callback(setting);
          }
        );
        if(op.checkbox){
          op.checkbox.addEventListener(
            'change', function(){
              Chat.settings.set(op.persistentSetting, op.checkbox.checked)
            }, false);
        }

    const btnPreview = Chat.e.btnPreview;
    Chat.setPreviewText = function(t){
      this.setCurrentView(this.e.viewPreview);
      this.e.previewContent.innerHTML = t;
      this.e.viewPreview.querySelectorAll('a').forEach(addAnchorTargetBlank);
      this.inputFocus();
    };
    Chat.e.viewPreview.querySelector('button.action-close').
      addEventListener('click', ()=>Chat.setCurrentView(Chat.e.viewMessages), false);
    let previewPending = false;
    const elemsToEnable = [btnPreview, Chat.e.btnSubmit, Chat.e.inputFields];
    const submit = function(ev){
      ev.preventDefault();
      ev.stopPropagation();
      if(previewPending) return false;

          D.enable(elemsToEnable);
        }
      });
      return false;
    };
    btnPreview.addEventListener('click', submit, false);
  })()/*message preview setup*/;

  (function(){/*Set up #chat-search and related bits */
    const settingsButton = document.querySelector('#chat-button-search');
    const eBody = E1('#chat-search-body');
    const cbToggle = function(ev){
      ev.preventDefault();
      ev.stopPropagation();
      Chat.setCurrentView(Chat.e.currentView===Chat.e.viewSearch
                          ? Chat.e.viewMessages : Chat.e.viewSearch);
      return false;
    };
    D.attr(settingsButton, 'role', 'button').addEventListener('click', cbToggle, false);
    Chat.e.viewSearch.querySelector('button.action-close').addEventListener('click', cbToggle, false);

  })()/*search view setup*/;

  /** Callback for poll() to inject new content into the page.  jx ==
      the response from /chat-poll. If atEnd is true, the message is
      appended to the end of the chat list (for loading older
      messages), else the beginning (the default). */
  const newcontent = function f(jx,atEnd){
    if(!f.processPost){