update using ajax in php code example

Example: real time update using ajax php

<script type="text/javascript" src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
    <script>
            $(document).ready(function() {
                setInterval(function() {  // set Interval function to carry out same operation in the time specified
                    $('#main').load('seminar-overview.php #main > *'); // Reloads 'seminar-overview.php' table every 6 seconds as <div> tag is specified and closed after table
            }, 6000);
                });
    </script>