php - How can I include Jquery in my Wordpress footer? -

i want .load php script every 10 seconds. load code not problem, in wordpress plugins use own jquery libraries, , if add jquery google link:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js" ></script> 

the other plugins crash.

i have following code in footer:

<?php if ( is_user_logged_in() ) { include 'completed.php'; } ?> 

i want include jquery script can execute following code:

<?php if ( is_user_logged_in() ) { ?> <div id="completed">     <script>     $(function(){         setinterval(function(){                $("#completed").load("completed.php");         }, 10 * 1000);     });     </script> </div> <?php } ?> 

do think can me out?

load jquery google ajax library in footer

function my_init() {     if (!is_admin()) {         // comment out next 2 lines load local copy of jquery         wp_deregister_script('jquery');          wp_register_script('jquery', 'http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js', false, '1.3.2', true);          wp_enqueue_script('jquery');     } } add_action('init', 'my_init');