width is a value, left is a value, and right is auto
.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<style type="text/css">
* .container {
position: relative;
background: black;
}
* .box {
position: absolute;
overflow: auto;
visibility: visible;
z-index: 1;
bottom: 20px;
width: 300px;
left: 10px;
right: auto;
height: 100px;
margin: 10px;
padding: 10px;
background: red;
}
* .before {
z-index: 2;
width: 100px;
height: 400px;
left: 400px;
right: auto;
top: 100px;
bottom: auto;
background: yellow;
}
</style>
</head>
<body>
<div class="container">
<div>BEFORE</div>
<div class="before">ABSOLUTE BEFORE</div>
<div class="box">this is a test. this is a test. </div>
</div>
</body>
</html>
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