add:  node = document.getElementById("fileAttachmentMenu"); if (node) node.setAttribute("disabled", "true");  
context: function HideMessageHeaderPane(){  var node = document.getElementById("collapsedHeaderView");  if (node)    node.collapsed = true;  node = document.getElementById("expandedHeaderView");  if (node)    node.collapsed = true;  node = document.getElementById("attachmentView");  if (node)    node.collapsed = true;}
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/7f8bd3a7919236af8e5c419a88bc6c98a532175b/msgHdrViewOverlay.js/buggy/mail/base/content/msgHdrViewOverlay.js