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<!DOCTYPE HTML>
<!--
Any copyright is dedicated to the Public Domain.
-->
<html><head>
<meta charset="utf-8">
<style type="text/css">
.none {
display:inline-block;
width:0; height:0; margin:0;
}
.b { border: 20px solid; }
.o { outline: 20px solid; }
</style>
</head>
<body>
<span class="none b" type="checkbox"></span>
<span class="none o" type="checkbox"></span>
<span class="none b" type="radio"></span>
<span class="none o" type="radio"></span>
<div style="color:green">
<span class="none b" type="checkbox"></span>
<span class="none o" type="checkbox"></span>
<span class="none b" type="radio"></span>
<span class="none o" type="radio"></span>
</div>
</body>
</html>