trouble with is_ajax_request()

Thx insite. I've figured out that as long as I have a tab open to the same server domain, the x-requested-with IS being sent. If I don't have a tab to my domain open, a preflight (rather than the POST) is being sent instead. My next problem is that the CI server code is actually starting up my controller/method. I thought from looking at a flow diagram that the browser/server handled the handshake w/o my code having to deal with it, and then my CI function would wake up when the real POST came in. However if you look at this https://developer.mozilla.org/en-US/docs...d_requests it seems that my CI application must handle the preflight itself(there is sample php code).

proof that an old dog can learn new tricks