The group option <optgroup> element is used to organize a list of items within the select element. By using the group option <optgroup> element, one or more option elements can be divided into related categories. The group option <optgroup> element can contain only option elements. Most web browsers indent each option while the name of the group is displayed as a title on top of those options.
Listed below are the most common attributes you can use for the group option <optgroup> element:
- class - provides the class or classes of the group option. This attribute is used to identify the name of the style class or classes to be used for rendering.
- disable - sets the state of the group to be disable in which it cannot be selected or controlled.
- id - provides a unique name for the group option.
- label - provides the name of the group option.
- lang - provides the language in which the enclosed content is coded.
- style - provides a cascading style sheet (CSS) properties to the group option.
- title - provides a text title for the group option. Most web browser displays the value of the title as a "tootip".
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8" />
<mate name="keywords" content="blog, web development" />
<title>the GROUP OPTION element</title>
</head>
<body>
<h1>
the GROUP OPTION element
</h1>
<form action="register.php" method="post" id="frmNew" name="frmNew">
<p>
<select name="selTransportation" id="selTransportation">
<optgroup label="Cars">
<option value="Audi">Audi</option>
<option value="Porsche">Porsche</option>
<option value="Subaru" selected="selected">Subaru</option>
</optgroup>
</select>
</p>
</form>
</body>
</html>
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