What codes make this accordion menu centered?

Here is the menu,
http://demo.tutorialzine.com/2009/12...uery/demo.html

Just want to know what codes that made it centered on the page?

Can you point me to the right codes? CSS? JS ?

Thanks in advanced.

ul.container {
margin: 0 auto;
padding: 50px;
width: 240px;
}

Download Firebug and your can see for yourself. :)

Thank you very much.