title: How can I cancel a file upload using the jQuery forms plugin
body: <p>I'm using the jQuery Forms plugin to do an asynchronous file upload. Currently, the only way for the user to abort that upload is to press the "Stop" button on their browser, which may cause other javascript and ajax requests to stop as well. I'd like to provide a cancel button, but I haven't found any way to cancel an upload <em>as it is happening</em> using the API. </p>
  
  <p>Is there a built-in way, or at least a robust hack I can use, to cancel the upload as it occurs?</p>