title: plugin to take annotations on a pdf in a HTML5 mobile app
body: <p>Using jQueryMobile and html5 I've build a mobile application in which I need to retrieve a pdf file from an external url, saving inside the app and give the possibility to take annotations on the this file.</p>
  
  <p>So I'm wondering if there is a plugin that I can use to take annotations on pdf.</p>
  
  <p>Thank you very much in advance.
  Any help will be strongly appreciated.</p>