title: Pull down to refresh on mobile web browser
body: <p>I am giving mobile support for a web application. I have a requirement in my application that pull down screen to refresh the page to get the latest updates. I have seen this feature in iPhone native applications and it was also implemented in twitter and foursquare mobile sites.</p>
  
  <p>I have seen some posts here but i unable to understand what exactly they are saying..
  I am very new to this environment. please guide me in doing this feature.</p>
  
  <p>Is there any javascript libraries or jqueries are there for this feature?</p>