<html>
<head>
<style>
table, th, td {
border: 1px solid black;
}
</style>
</head>
<body>
<h1>The th headers attribute</h1>
<table>
<tr>
<th id="name" colspan="2">Name</th>
</tr>
<tr>
<th headers="name">Firstname</th>
<th headers="name">Lastname</th>
</tr>
</table>
</body>
</html>