rem: messenger.openAttachment(url, displayName, messageUri); 
add: var args = {dspname: displayName, opval: 0};  window.openDialog("chrome: "openSaveAttachment", "chrome,modal", args); if (args.opval == 1) messenger.openAttachment(url, displayName, messageUri); else if (args.opval == 2) messenger.saveAttachment(url, displayName, messageUri); 
context: function OpenAttachURL(url, displayName, messageUri){  messenger.openAttachment(url, displayName, messageUri);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/c9b40050dfa1084a356da3e844f4fc4d1e5fee6a/msgHdrViewOverlay.js/buggy/mailnews/base/resources/content/msgHdrViewOverlay.js