title: How to intercept all http requests including form submits
body: <p>I would like to intercept all http requests going out from my web page and add a parameter to the request body. My page includes forms - I also want to capture form submits. I have tried using Jquery ajaxSend and Javascript's setRequestHeader but both did not work for me. How do I achieve this?</p>
  
  <p>Thanks</p>