add: if (gCancelCallback) gCancelCallback(); 
context: function onCancel(){  // close the window  return true;}
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/4c82b1b099b50a6a650d33f6a1dea9d7e21c4f7f/mailViewList.js/buggy/mailnews/extensions/mailviews/resources/content/mailViewList.js