[jQuery] Detect ajax with file uploads

[jQuery] Detect ajax with file uploads


Hi! I'm developing a framework that allow all navigation in normal
mode or in ajax load.
I have a form to upload images and I can upload files correctly, but
if I use the ajax form, the save page don't receive the
HTTP_X_REQUESTED_WITH in $_SERVER PHP array (only occours when a file
is uploaded).
How can I detect an ajax load with a file upload form?