Transparency is one of those weird things that is treated completely differently in all browsers. To cover all your bases, you need four separate CSS statements. Fortunately they don’t interfere with each other really, so using them all every time you wish to add transparency is no big hassle and worry-free. Here they are, and are currently set to 50% transparency:
.transparent_class {
filter:alpha(opacity=50);
-moz-opacity:0.5;
-khtml-opacity: 0.5;
opacity: 0.5;
}
UPDATE: I wanted to pull this post out of the archives and update it a bit because it there seems to be a good ...








