rem: if (event.originalTarget.localName == 'treechildren') 
add: if (event.originalTarget.localName == "listboxbody") 
context: function AttachmentBucketClicked(event){  if (event.button != 0)    return;  if (event.originalTarget.localName == 'treechildren')    goDoCommand('cmd_attachFile');}
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/d38a0937d9c93a0a9d913e2ac781e4328bb8cc73/MsgComposeCommands.js/clean/mailnews/compose/resources/content/MsgComposeCommands.js