NTLM authentication check for Firebug

netReps.js

    isCorrectNtlm: function(file) 
    {
        var resp = file.responseHeadersText.match(/www-authenticate:\s(.+)/i)[1]; // file.responseHeaders is undefined here
        return (resp && resp.search(/ntlm|negotiate/i) >= 0);
    },

    isError: function(file)
    {
        if (file.aborted)
            return true;

        if (file.responseStatus == 401)
        {
            if (this.isCorrectNtlm(file) == true)
                return false;
        }

        var errorRange = Math.floor(file.responseStatus/100);
        return errorRange == 4 || errorRange == 5;
    },

http://code.google.com/p/fbug/issues/detail?id=4758