Problem with background since changing head.php file

Hey everyone, I urgently need assistance to a little problem I have on my website.

I today spotted on my website www.elaundry.com.au that my logo didnt have a link on it. I couldnt find where to amend this at the backend of the website so downloaded the head.php file from my server, opened it in dreamweaver and added a <a href></a> tag around the logo image in this file. On upload back to the server it has deleted the black background that runs all the way through the site. I really need to restore it back to black asap. Anyone know the problem? I didnt change any php just added to it.

I have since deleted the <a></a> from head.php to see if this fixes it, but had no joy!

Thanks in advance!