HTML select optgroup group tag_html/css_WEB-ITnose

optgroup tag -- represents the category name of the group selection (this category name cannot be selected)

optgroup tags are in pairs Appears, starting with 5b7a15bed8615d1b843806256bebea72 and ending with bc2752b74169f27a1fb12a4976198c73

Reference URL: http://www.dreamdu.com/xhtml/tag_optgroup/

attribute.

common -- public attributes

disabled -- the input field cannot get focus, cannot be selected, is displayed in gray, and has no effect in the form

label -- option group The tag

opt is the abbreviation of option, which means "option" in Chinese. group, Chinese "group

Example:

<form action="dreamdu.php" method="post" id="dreamduform">    选择一个你在梦之都最想学的    <select id="WebDesign" name="WebDesign">        <optgroup label="client">            <option value="HTML">HTML</option>            <option value="CSS">CSS</option>            <option value="javascript">javascript</option>        </optgroup>        <optgroup label="server">            <option value="PHP">PHP</option>            <option value="ASP">ASP</option>            <option value="JSP">JSP</option>        </optgroup>        <optgroup label="database">            <option value="Access">Access</option>            <option value="MySQL">MySQL</option>            <option value="SQLServer">SQLServer</option>        </optgroup>    </select></form>

Reprint source: http://www.dreamdu .com/xhtml/tag_optgroup/