I found it ! \o/
The problem was that in my AJAXCheckUsername.jsp, I was not setting
the content-type !
So I added this line : Response.addHeader("Content-Type: text/plain;
charset=iso-8859-1");
Now Internet Explorer is not giving any error and it looks like
Firefox is getting the response faster too (~150ms instead of ~300ms).
Things to remember when using Ajax with IE
------------------------------------------
1) Specify the content-type in the response object
2) Specify the cache directives (Pragma: no-cache, Cache-Control: no-
cache, Expires: [past time])
Thanks for all your help on this !
I really appreciated your efforts !
0xCAFE