.transparent_class { filter:alpha(opacity=50); -moz-opacity:0.5; -khtml-opacity: 0.5; opacity: 0.5; } Here is what each of those CSS properties is for: opacity: 0.5; This is the "most important" one because it is the current standard in CSS. Thi
.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 amount of int