title: Take a screenshot of whole screen using html5/javascript?
body: <p>I am looking to take a full screenshot through a webpage, outside of the browser window. Basically, I am trying to build a help tool for both web-based apps and offline programs, and as a part of this I would like to be able to take screenshots from a webpage so the user does not have to download a program to take a screenshot/upload it to our website.</p>
  
  <p>I am aware there may not be a solution to this, but if there was that would be awesome!</p>
  
  <p>Cheers in advance</p>