Firefox 3.5 now allows you to make AJAX Requests, or more correctly XMLHttpRequests cross domain (in other words foo.com can make XHR requests to bar.com). When I heard about this, my first is that they would use the cross-domain.xml file that Flash has supported for years to achieve this.

Here's an outline of the presentation on AJAX that I gave today at my ColdFusion users group meeting.

On Internet Explorer in order to write AJAX based web applications you have to use an ActiveX object.

var request = new ActiveXObject("Microsoft.