I am trying to implement an almost cross-browser bookmark functionality and found this on SO: How do I add an "Add to Favorites" button or link on my website?
You should use wp_enqueue_script
(Documentation)
Your dependencies may not being called before that script. If you enqueue the script you can make the dependencies load first using
wp_enqueue_script( $handle, $path to file, array( jquery ));`
Since I placed jQuery in the array it will now load jQuery before the script.