css2.0 make div background color semi transparent

Hi experts

Using css2.0 is there any way that i can make a div background color semi-transparent, I have to use css2.0 because i am using Visual Web Developer 2008 which only seems to support css2.0.
dizzycatAsked:
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AmickCommented:
All modern browsers, including IE9, support RGBA (Red,Green, Blue, Alpha).  
For really old browsers you will want to include a fallback color.

Here's a workaround for older versions of IE.
<!--[if IE]>

   <style type="text/css">

   .color-block {
       background:transparent;
       filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000050,endColorstr=#99000050);
       zoom: 1;
    } 

    </style>

<![endif]-->

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dizzycatAuthor Commented:
Could you show me an example of RGBA.
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AmickCommented:
Here's a link to an article that discusses the matter:
http://css-tricks.com/rgba-browser-support/

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AmickCommented:
The W3C has a demo page at http://www.w3.org/Talks/2003/0521-CSS-WWW2003/opacity2.html that shows using a transparent .png background as a backup for rgba.  This might be useful to you as well.
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dizzycatAuthor Commented:
Works great thankyou Amick.
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AmickCommented:
Here's some code to play around with:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>RGBA Div Example</title>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8">
<style type="text/css">
.alphaExample {background-color:rgba(32,128,27,.2);}
</style>
</head>

<body>

<div class="alphaExample">
<p>Sed dignissim lacinia nunc. Curabitur tortor. Pellentesque nibh. Aenean quam. In scelerisque sem at dolor. Maecenas mattis. Sed convallis tristique sem. Proin ut ligula vel nunc egestas porttitor. <i>Lorem ipsum dolor sit amet, consectetur adipiscing elit</i>. Morbi lectus risus, iaculis vel, suscipit quis, luctus non, massa. Fusce ac turpis quis ligula lacinia aliquet. Mauris ipsum. <b>Curabitur sodales ligula in libero</b>. Nulla metus metus, ullamcorper vel, tincidunt sed, euismod in, nibh. </p>

</div>

<p>Quisque volutpat condimentum velit. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Nam nec ante. Sed lacinia, urna non tincidunt mattis, tortor neque adipiscing diam, a cursus ipsum ante quis turpis. Nulla facilisi. <b>Proin ut ligula vel nunc egestas porttitor</b>. Ut fringilla. Suspendisse potenti. Nunc feugiat mi a tellus consequat imperdiet. Vestibulum sapien. Proin quam. Etiam ultrices. <b>Nam nec ante</b>. Suspendisse in justo eu magna luctus suscipit. </p>


</body>
</html>

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