Select box option groups
Using the optgroup element.
HTML
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Select menus: option groups</title>
<style>
body {
font: 100% arial, helvetica, sans-serif;
}
fieldset {
padding: 0 1em 1em 1em;
}
legend {
padding: 1em;
}
</style>
</head>
<body>
<form action="someplace.php">
<fieldset>
<legend>Favourite book</legend>
<label for="book">Name: </label>
<select name="book" id="book">
<optgroup label="Camus">
<option>The Outsider</option>
<option>The Rebel</option>
<option>The Plague</option>
</optgroup>
<optgroup label="Orwell">
<option>Animal Farm</option>
<option>Nineteen Eighty-Four</option>
<option>Down and Out in Paris and London</option>
</optgroup>
</select>
</fieldset>
</form>
<!-- Link back to HTML Dog: -->
<p><a href="http://www.htmldog.com/examples/"><img src="http://www.htmldog.com/badge1.gif" alt="HTML Dog"></a></p>
</body>
</html>