Re-spec patch attached

Not sure if I should just patch it directly or have you review it first...

The issue is a bad feature detect that makes IE browsers abort part of the respec script when an exception is thrown trying to create an ActiveX object for XHR. Since XHR has been baked into IE since 2006 or so, I reversed the feature detect to look for the standard XHR _first_, then detect the fallback second.

Note, this was minified script.

-Travis