rem: ltnRemoveCalendar(ltnSelectedCalendar()); 
add: var promptService = Components.classes["@mozilla.org/embedcomp/prompt-service;1"].getService(Components.interfaces.nsIPromptService);  var result = {}; var calendarBundle = document.getElementById("bundle_calendar"); var calendar = ltnSelectedCalendar(); var ok = promptService.confirm( window, calendarBundle.getString("unsubscribeCalendarTitle"), calendarBundle.getFormattedString("unsubscribeCalendarMessage",[calendar.name]), result);  if (ok) { ltnRemoveCalendar(calendar); } 
context: function ltnDeleteSelectedCalendar(){    ltnRemoveCalendar(ltnSelectedCalendar());}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/0e3fbfb4df613229ffe7ed0723a595eb875b1349/messenger-overlay-sidebar.js/clean/calendar/lightning/content/messenger-overlay-sidebar.js