add:  document.getElementById( "calendar-wizard" ).canAdvance = true; 
context: function launchFilePicker( Mode, ElementToGiveValueTo ){   // No show the 'Save As' dialog and ask for a filename to save to   const nsIFilePicker = Components.interfaces.nsIFilePicker;   var fp = Components.classes["@mozilla.org/filepicker;1"].createInstance(nsIFilePicker);   // caller can force disable of sand box, even if ON globally   switch( Mode )   {   case "open":      fp.defaultExtension = "ics";      fp.appendFilter( filterCalendar, "*" + extensionCalendar );      fp.appendFilter( filterXcs, "*" + extensionXcs );         fp.init(window, "Open", nsIFilePicker.modeOpen);      break;   case "save":      fp.init(window, "Save", nsIFilePicker.modeSave);      //if(calendarEventArray.length == 1 && calendarEventArray[0].title)      //   fp.defaultString = calendarEventArray[0].title;      //else         fp.defaultString = "Mozilla Calendar events";         fp.defaultExtension = "ics";         fp.appendFilter( filterCalendar, "*" + extensionCalendar );      fp.appendFilter( filterRtf, "*" + extensionRtf );      fp.appendFilters(nsIFilePicker.filterHTML);      fp.appendFilter( filterCsv, "*" + extensionCsv );      fp.appendFilter( filterXcs, "*" + extensionXcs );      fp.appendFilter( filterRdf, "*" + extensionRdf );      break;   }      fp.show();   if (fp.file && fp.file.path.length > 0)   {      /*if(filePath.indexOf(".") == -1 )          filePath += extension;      */      document.getElementById( ElementToGiveValueTo ).value = fp.file.path;   }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/a6427525226ee2ce13236c703a07aac6c0df0b62/wizard.js/clean/calendar/resources/content/wizard.js