title: Identify Unique Browser / tab instance, e.g. User has 2 tabs open on mysite.com-identify each
body: <p>I have read <a href="http://www.pcreview.co.uk/forums/unique-browser-id-t3951101p2.html" rel="nofollow">this</a> and many other links the past few days.</p>
  
  <p>The problem is that I need to have a unique identifier for each tab or browser that a user has open for mysite.com (example site name)</p>
  
  <p>I cannot use a unique session, as when I open mysite.com and have e.g. selected "carrots" in the session, then all the other tabs/browsers for mysite.com now has "carrots" in the specific session value.</p>
  
  <p>But still the server obviously identifies each browser/tab uniquely. Is there a way to get hold of this unique browser/tab ID, or to create a unique one? </p>
  
  <p>I am not referring to generating a unique ID oneself via JavaScript, I saw some good examples on StackOverflow. The problem would be that I'd need to implement it on each master page and carry it around between master/non master pages. Also for e.g. In my instance it won't work as I can have the browser open and it would generate 20 different IDs if I ran it 20 times across a few pages e.g. when I cannot transfer the value across ports.</p>
  
  <p>So please, not to waste everyone's time, this is not a random GUID creation question, this question relates to obtaining a unique recreatable ID (if it gets lost)for each tab/browser, preferably identifying by the link to the server.</p>