AW: and IE8

You're right, the native XMLHTTP Support is disabled and that's the reason why Ajax doesn't work. I can also confirm that with your changes in Myfaces scripts the Ajax call works fine without enabling the XMLHTTP setting. Thanks a lot for your investigation. Regards Wahid -Ursprüngliche

AW: and IE8

Hi, This is the output on the scripting console: LOG: starting send LOG: defining scope This LOG: scope This done LOG: Error:Objekt erwartet TypeError: Objekt erwartet When I start debugging into the scripts, in standard mode the error occurs in _Runtime.js(374): var _ret = new XMLHttpRequest();

AW: and IE8

Hi Werner, I tried your test project with the same result. It works only in the compatibility mode of IE8. The Same error in the standard mode. BUT, when I remove the XHTML DocType line both tests work fine!!! Are you sure that you are not in the compatibility mode in your XP test environment?