title: How to upload an image from a URL using AJAX?
body: <p>I want users to be able to add a photo to a page by giving its URL.  I want to both display it and save the image on my server.  Can I do this using AJAX, and ideally with Jquery?</p>
  
  <p>I'm currently using the Jquery File Upload plugin to handle uploads from the user's computer, however I could not find a way of using it to handle upload by URL.</p>