<!DOCTYPE html>
<html><head>
<title>CSS Reftest Reference</title>
<link href="mailto:mibalan@adobe.com" rel="author" title="Mihai Balan">
<style>
.left,
.center,
.right {
position: relative;
width: 100px;
height: 100px;
}
.left {
top: 0;
left: 0;
background-color: lightgreen;
}
.center {
top: -75px;
left: 25px;
background-color: lightblue;
}
.right {
top: -150px;
left: 50px;
background-color: yellow;
}
#region {
width: 150px;
height: 150px;
/* the properties below are needed to force the region in creating a stacking context */
position: relative;
z-index: -1;
}
#dummy {
background-color: purple;
width: 100px;
height: 100px;
margin-top: -75px;
margin-left: 75px;
}
</style>
</head>
<body>
<ol>
<li>You should see no red.</li>
<li>You should see four colored overlapping squares, from back to front: a purple square, a green square, a blue square and a yellow square.</li>
</ol>
<div id="region">
<div class="left"></div>
<div class="center"></div>
<div class="right"></div>
</div>
<div id="dummy"></div>
</body></html>