<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
.collapse {
visibility: collapse;
}
table {
border: 2px solid #666;
}
td {
border: 1px solid #ccc;
}
</style>
</head>
<body>
<h2>Visibility property example</h2>
<p>Here the "collapse" value is applied.</p>
<table>
<tr>
<td>10</td>
<td class="collapse">100</td>
<td>1000</td>
</tr>
<tr>
<td>20</td>
<td>200</td>
<td>2000</td>
</tr>
<tr class="collapse">
<td>30</td>
<td>300</td>
<td>3000</td>
</tr>
<tr>