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<!DOCTYPE HTML>
<head>
<meta charset="UTF-8">
<title>CSS Test Reference: dynamic changes to offset properties</title>
<link rel="author" title="L. David Baron" href="https://dbaron.org/">
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<style>
body {
margin: 0;
}
#container {
position: absolute;
width: 100px;
height: 100px;
background: yellow;
}
#abspos {
margin-top: 10px;
margin-left: 70px;
width: 10px;
height: 10px;
background: fuchsia;
}
</style>
<div id="container">
<div id="abspos"></div>
</div>