Need help in converting wordpress txt logo into graphical logo

[asif]

I customized this theme of a client.
http://www.chapaaonline.com/

i wanted to place a graphic logo instead of txt logo"chapaaonline"

i went in wordpress theme editor: there i find two files.
header.php

if i want to place this logo instead of txt logo,

(header.php) where in this code. i do change.
--------------------------------------

 <div class="logo">
<h1><a href="<?php echo get_option('home'); ?>/" title="<?php bloginfo('name'); ?>    - <?php bloginfo('description'); ?>">
      <?php bloginfo('name'); ?>
      <span>
      <?php bloginfo('description'); ?>
      </span></a></h1>
  </div>
  <!--/logo -->

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Thanks advance for your help.

 

[4pm]

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<!--logo-->
<div class="logo">
<a href="<?php echo get_option('home'); ?>/" title="<?php bloginfo('name'); ?> - <?php bloginfo('description'); ?>">
<img 
src="/full_path_to_your_logo_file_relative_to_wp_root_dir" 
alt="<?php bloginfo('name'); ?> - <?php bloginfo('description'); ?>" />
</a>
</div>
<!--/logo -->

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