[david_kw]

I think there are lots of possible ways as usual. This might be a better question for the CSS forum, but one way to handle it could be to change the class of the tab when it is clicked to a new class with a different graphic. The CSS could be set up something like this.

.fs_sponsors {
  background: url(images/sponsors.gif) no-repeat;
  width: 77px;
  height: 16px;
  float: left;
  margin-left: 79px;
}

.fs_sponsors_hid {
  background: url(images/sponsors_hid.gif) no-repeat;
  width: 77px;
  height: 16px;
  float: left;
  margin-left: 79px;
}

david_kw