Removing Underline

Hello,
I'm having trouble removing the underline from the images at the top (category images). I have changed the CSS quite a bit and still cannot get them removed. I've been working on this issue at the very bottom of the CSS file (so skip there if you need to).

http://www.thriftydigitalcamera.com/index.php?main_page=index&cPath=20

CSS Location:
http://www.thriftydigitalcamera.com/includes/templates/classic/css/stylesheet.css

B,

find your_template stylesheet.css

Find this:

1. div.box#greenleft a,div.box#greenleft a:visited { color:#000; text-decoration:underline;
   Replace with:

2. div.box#greenleft a,div.box#greenleft a:visited {
   color:#000;}

That brought me closer to what I'm looking for. The only problem is then there are no underlines anywhere. I want the text to be underlined on hover but not the image. Perhaps I should split the link tags up to two link tags for the category images (as is already done for the product links below)? Anyway, I now have it with hover underline (like I like) but it is getting the image, too. See how it underlines the category images but not the product images below? Like I said, the link tags are split up to two parts for product images.

http://www.thriftydigitalcamera.com/index.php?main_page=index&cPath=2