title: How to upload file directly from a webpage?
body: <p>i am generating barcode from the website barcodes4.me.
  it generates an image on the url:<a href="http://www.barcodes4.me/barcode/qr/myfilename.png?value=My%20QR%20Code" rel="nofollow">http://www.barcodes4.me/barcode/qr/myfilename.png?value=My%20QR%20Code</a>.
  now i want to save (upload) this file on a click event of a button.
  any idea how to do that</p>