Code:
<table style="background: #333333 url('logobkdg.jpg') no-repeat center center;">
or

Code:
(in stylesheet)

table.classname {
background: #333333 url('logobkdg.jpg') no-repeat center center;
}

(in code)
<table class="classname">
Of the two, the second is preferred, because the logo url is relative to the stylesheet, so you can have html files in any folder that refer to the class, and the image path will always be derived from the stylesheet path.