Exception from script

uncaught exception: [Exception... "Component returned failure code: 0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsIDOM3Document.domConfig]" nsresult: "0x80004001 (NS_ERROR_NOT_IMPLEMENTED)" location: "JS frame :: http://localhost:8000/test.js :: run :: line 53" data: no]

FireBugResults.js

>>> var request = "window.document";
>>> var result = new Array;
>>> var i = 0;
>>> eval('for(key in '+request+'){result[i]=eval("typeof '+request+'."+key);result[i+1]="'+request+'."+key;i+=2;}');
>>> result.length
304

test.js

// Dean Edwards/Matthias Miller/John Resig

function init() {
  // quit if this function has already been called
  if (arguments.callee.done) return;

  // flag this function so we don't do the same thing twice
  arguments.callee.done = true;

  // kill the timer
  if (_timer) clearInterval(_timer);

  // do stuff
  run();
};

/* for Mozilla/Opera9 */
if (document.addEventListener) {
  document.addEventListener("DOMContentLoaded", init, false);
}

/* for Internet Explorer */
/*@cc_on @*/
/*@if (@_win32)
  document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
  var script = document.getElementById("__ie_onload");
  script.onreadystatechange = function() {
    if (this.readyState == "complete") {
      init(); // call the onload handler
    }
  };
/*@end @*/

/* for Safari */
if (/WebKit/i.test(navigator.userAgent)) { // sniff
  var _timer = setInterval(function() {
    if (/loaded|complete/.test(document.readyState)) {
      init(); // call the onload handler
    }
  }, 10);
}

/* for other browsers */
window.onload = init;

/* End Dean Edwards/Matthaias Miller/John Resig */


function run() {
  var request = "window.document";
  var result = new Array;
  var i = 0;
  eval('for(key in '+request+'){result[i]=eval("typeof '+request+'."+key);result[i+1]="'+request+'."+key;i+=2;}');
  console.log(result);
}