I think there is a mis-placed <tr> tag in the closing HTML, second-last line, for the wrapper in this style?

I'm trying to work on a wrapper of my own, essentially creating a graphical frame around any content. I just had a question or two about the wrapper used in this style.

In the Opening HTML, the first row defines the top_left, top_middle and top_right images. For the corner cells, top_left and top_right, only img tags are used. However, for the top_middle cell, there is both a background style defined and an img tag used. I understand why the background style is needed, but why is the img tag there? Is it to force the row width/height?

Cheers.