HTML optgroup 标签

optgroup 标签 -- 代表分组选择项的类别名(此类别名不能选择)

optgroup标签是成对出现的,以<optgroup>开始,以</optgroup>结束

属性:

Common -- 一般属性

label -- 说明选择项

示例
<form action="dreamdu.php" method="post" id="dreamduform">
        <label for="WebDesign">选择一个你在梦之都最想学的</label>
        <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>