Theme smflogo.gif on top

[DAU]

At first I´ve to say sorry but my english is very bad but i hope i find anyone who understand me!

I want take the smflogo.gif on the Top of the side centered, but how ?

<img src="', $settings['images_url'], '/smflogo.gif" width="500" style="float: left;" alt="" />

in this line i can take the logo on the right side and on the left side but what is the correct form to take it in the middle?

Thanks for answers, and sorry but i try to search for a nother posting like this but with my bad english i did´t find one

[Isindrya]

A guess: float:center or float:middle?