Wordpress: Add jQuery from Google

jquery-google.php

/*-----------------------------------------------------------------------------------*/
/* Add jQuery
/*-----------------------------------------------------------------------------------*/
// Call the google CDN version of jQuery for the frontend
// Make sure you use this with wp_enqueue_script('jquery'); in your header
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');
}