Include jQuery in WordPress Theme. The following is the best way to go about it. Add the following to the theme's functions.php file. Replace the URL with the location of what version of jQuery you want to use.
<?php
// Replace the URL with the location of what version of jQuery you want to use.
if (!is_admin()) add_action("wp_enqueue_scripts", "my_jquery_enqueue", 11);
function my_jquery_enqueue() {
wp_deregister_script('jquery');
wp_register_script('jquery', "http" . ($_SERVER['SERVER_PORT'] == 443 ? "s" : "") . "://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js", false, null);
wp_enqueue_script('jquery');
}
?>