How to get the registered scripts

Hi,

Theres a way to get the registered scripts(wp_register_scripts())? I want to get them to load with head.js.

I gave a look at Wp_Scripts class, but I doesn’t found anything about:
http://core.trac.ww.wp.xz.cn/browser/tags/3.4.2/wp-includes/class.wp-scripts.php

Thanks