lucy24 - 9:58 pm on Nov 3, 2011 (gmt 0)
Days later, it occurs to me:
Look at the selector name . . .
<div id="popBox" class="popBox">
which is supplemented by the following line,
<a class="popBox_close" href="#"></a></div>
It appears it's a pop up help
Fooled us, didn't it? Could be intended to fool the search-engine robots, too.