Registering sharing scripts with Wordpress (inc Pinterest)

functions02.php

<?php
function register_sharing_scripts() 
{
    if( is_single() || is_home() ) 
    {
        wp_enqueue_script('twitter-share', 'http://platform.twitter.com/widgets.js', null, null, true);
        wp_enqueue_script('facebook-share', 'http://static.ak.fbcdn.net/connect.php/js/FB.Share', null, null, true);
        wp_enqueue_script('google-plusone', 'https://apis.google.com/js/plusone.js', array(), null, true);
        wp_enqueue_script('pinterest', 'http://assets.pinterest.com/js/pinit.js', array(), null, true);
    }
}
add_action( 'wp_enqueue_scripts', 'register_sharing_scripts' );
?>