title: How to track user hits back button on the browser
body: <p>I want to track event which fire on, when user hits back button on the browser.
  I found many post related this but all suggest use of <code>.onbeforeunload</code> event. but this event also fire on, when page is refresh or browser window is closed.</p>
  
  <p>If there is any idea to track only browser back event.
  Thanks for your help...!!!</p>