CSS Semi-Transparency

CSS Transparency for IE and Mozilla, Firebird and Firefox (-moz-opacity and filter: alpha) - DoMedia:
A working solution for transparency in web standards browser
Here's the CSS syntax:
p {color: rgba(255, 255, 255, 0.5);}

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#bgNew2 {
  width: 400px;
  height: 300px;
  background: url(http://www.domedia.org/oveklykken/leaf.gif) repeat;
  border: 2px solid black;
  padding: 40px;
}
#bgNew2 #bgNew2p {
  padding: 40px;
  font-size: 18px;
  font-weight: bold;
  background: rgba(255, 255, 255, 0.5);
}