CSS Cross Browser Transparency

Thought I would post this bit of CSS as well (if you didn’t catch it, I’m doing a little web UI work right now) I often use as well to create a DIV for screen regions with mouseover feedback.

.transparent {
  filter:alpha(opacity=0);
  -moz-opacity:0.0;
  -khtml-opacity: 0.0;
  opacity: 0.0;
}