Raymond Camden justed posted an article on detecting jQuery AJAX operation using ColdFusion. I honor of that post, I thought I'd share the UDF I've been using in my application for quite some time:
The code uses the exact same logic the technique in Raymond's post, but having the code in a function makes your detection code a lot easier to read.
Now when you want to detect if a request came from an AJAX operation, you can just do:
Doesn't get any easier than that!