title: Updating contents of a jsp page without refreshing
body: <p>I have a jsp page which shows the contents of a table.
  While the user views a page the contents of the table changes on a second-by-second basis.
  So the user has to refresh the page every time to see fresh and updated contents.
  How can i update contents of the jsp page without having to refresh the page.
  I wanted a functionality just like in gmail.com where the size of the mailbox just keeps increasing without users refreshing.</p>