function tb_enqueue() {
 wp_enqueue_script(‘jquery’);
 wp_enqueue_script(‘thickbox’);
}

function tb_inject() {
?>

<link rel="stylesheet" href="<?= get_option(‘siteurl’); ?>/<?= WPINC; ?>/js/thickbox/thickbox.css" type="text/css" media="screen" />
<script type="text/javascript">
var tb_pathToImage = "<?= get_option(‘siteurl’); ?>/<?= WPINC; ?>/js/thickbox/loadingAnimation.gif";
var tb_closeImage = "<?= get_option(‘siteurl’); ?>/<?= WPINC; ?>/js/thickbox/tb-close.png"
</script>

<?php
}

add_action(‘wp_head’, ‘tb_enqueue’, 1);
add_action(‘wp_footer’, ‘tb_inject’, 10);