Solution:
You may want to try the following code in the functions.php file.
function init_my_scripts()
{
if (!is_admin())
{
wp_deregister_script('jquery');
wp_register_script('jquery', 'http://code.jquery.com/jquery-1.6.1.min.js');
wp_enqueue_script('jquery');
wp_deregister_script('jQuery UI Core');
wp_register_script( 'jQuery UI Core', 'https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.13/jquery-ui.min.js'); // register key jQueryUI with URL of Google CDN
wp_enqueue_script( 'jQuery UI Core' ); // include jQueryUI
wp_register_script('filmstrip', get_bloginfo('template_directory').'/javascript/filmstrip.js');
wp_enqueue_script('filmstrip');
wp_register_script('smoothDivScroll', get_bloginfo('template_directory').'/SmoothDivScroll-1.1/js/jquery.smoothDivScroll-1.1-min.js');
wp_enqueue_script('smoothDivScroll');
}
}
add_action('init', 'init_my_scripts');
Of course, you can change the jQuery CDN to Google CDN, change ‘template_directory’ to ‘stylesheet_directory’, etc.