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<!DOCTYPE html>
<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>testcase</title>
<style>
.tt {
border-collapse: collapse;
}
.nix {
display: none;
}
.ref {
border: solid 3px darkred;
}
td {
width: 20px;
height: 20px;
}
</style>
</head>
<body>
<table class="tt">
<tr id="1"><td > </td></tr>
<tr id="2" class="nix"><td > </td></tr>
<tr id="3" class="ref"><td > </td></tr>
<tr><td> </td></tr>
</table>
</body>
</html>