How to Change the Logo?

[Faizann20]

Hey guys, This is my site, I want to change the logo " the one which is text" not the header, but dont know how to do it, someone help please:

SeoBuzzy.com

Faizann20 Reviewed by Faizann20 on 19th Jun 2012. How to Change the Logo? Hey guys, This is my site, I want to change the logo " the one which is text" not the header, but dont know how to do it, someone help please: SeoBuzzy.com Rating: 5

[immu]

in header
search for

<div id="blogTitle"
<a href="http://www.seobuzzy.com/">
                    SeoBuzzy                     </a>
<br>
<span></span>
</div> 

and remove it

[Faizann20]

global $page, $paged;

wp_title( '|', true, 'right' );

// Add the blog name.
bloginfo( 'name' );

// Add the blog description for the home/front page.
$site_description = get_bloginfo( 'description', 'display' );
if ( $site_description && ( is_home() || is_front_page() ) )
echo " | $site_description";

This is there, I need to replace it with a picture, how to do it?