Pure CSS opacity and how to have opaque children, css, xhtml, St. 28th April 2012 Opacity is a desirable thing in this day and age; especially with the design trends that typified the web2.0 movement.
There are a few ways of doing this that I'll discuss but this super-short tutorial is about CSS opacity. CSS opacity. HTML Playground, html, css reference by example. A List Apart: A List Apart.