title: Hide the pdf source in google viewer
body: <p>I use Google viewer to show pdf on webpage.</p>
  
  <p><a href="http://docs.google.com/viewer?url=http%3A%2F%2Fresearch.google.com%2Farchive%2Fbigtable-osdi06.pdf" rel="nofollow">http://docs.google.com/viewer?url=http%3A%2F%2Fresearch.google.com%2Farchive%2Fbigtable-osdi06.pdf</a></p>
  
  <p>My client wants to hide the source of url i.e If view source a html page, it shows the path of the file.</p>
  
  <p>Please help me, is any way to pass the url by php or any other ideas?</p>