What codes make this accordion menu centered?

Here is the menu,

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. :slight_smile:

Thank you very much.