rem:  if (typeof(handler) == "function") this._overrideErrors[err] = handler; else if (handler) this._overrideErrors[err] = createHandlerFunc(handler); else delete this._overrideErrors[err]; 
add: this._handlerToField(handler, this._overrideErrors, err); 
context:   registerErrorHandler: function(err, handler)  {    if (!(err in HTTP_ERROR_CODES))      dumpn("*** WARNING: registering non-HTTP/1.1 error code " +            "(" + err + ") handler -- was this intentional?");    // for convenience, handler can be a function if this is run from xpcshell    if (typeof(handler) == "function")      this._overrideErrors[err] = handler;    else if (handler)      this._overrideErrors[err] = createHandlerFunc(handler);    else      delete this._overrideErrors[err];  },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8395/48038f6dc515e7c7dc12db900cf6a389d46323fc/httpd.js/clean/netwerk/test/httpserver/httpd.js