add: document.getElementById("calendar-view-box").collapsed = true; 
context: function LtnObserveDisplayDeckChange(event){    var deck = event.target;    var id = null;    try { id = deck.selectedPanel.id } catch (e) { }    if (id == "calendar-view-box") {        GetMessagePane().collapsed = true;        document.getElementById("threadpane-splitter").collapsed = true;        gSearchBox.collapsed = true;    } else {        // nothing to "undo" for now        // Later: mark the view as not needing reflow due to new events coming        // in, for better performance and batching.    }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/3f7875d176f49ef9d223892a8d2dbc925080d32b/messenger-overlay-sidebar.js/clean/calendar/lightning/content/messenger-overlay-sidebar.js