.tab {
  background-color: #f0f0f0;
  border: 2px solid #000000;
  border-bottom-width: 2px;
  border-color: #d2d0ff #909be0 #909be0 #d2d0ff;
  -moz-border-radius: .75em .75em .75em .75em;
  border-radius-topleft: .5em;
  border-radius-topright: .5em;
  border-radius-bottomleft: .5em;
  border-radius-bottomright: .5em;
  padding: 2px 1em 2px 1em;
} 

.tabup {
  background-color: #f0f0f0;
  border: 2px solid #000000;
  border-bottom-width: 2px;
  border-color: #909be0 #d2d0ff #d2d0ff #909be0;
  -moz-border-radius: .75em .75em .75em .75em;
  border-radius-topleft: .5em;
  border-radius-topright: .5em;
  border-radius-bottomleft: .5em;
  border-radius-bottomright: .5em;
  padding: 1px 1em 1px 1em;
}