this code supposedly makes the transparent code that only works in ie work in Internet explorer, Firefox, and Opera. I have not tried it myself but found it online and thought others might like to try it out
<div style="display:block; height:150px; width:200px; background:#00FFFF">
<div style="color:yellow; height:100px; width:150px; background:#000099; filter:alpha(opacity=50); -moz-opacity:0.5; opacity:0.5; -khtml-opacity:0.5; font-size:1.3em; padding:5px">
At 50% filtered opacity, this is the box
</div></div>