title: How to fetch Referrer URL's Title
body: <p>How do we get the title of referrer URL page? I can get the referrer by</p>
  
  <p>var referrer = document.referrer;</p>
  
  <p>but unfortunately there's no (document.referrer).title available in javascript similar to document.getElementsByTagName('title')[0].innerHTML. </p>
  
  <p>Any ideas how I can get this value?</p>