Ngôn ngữ HTML - Thẻ select (combobox)
ĐỊNH NGHĨA COMBO BOX TRONG HTML
Dùng để tạo danh sách xổ xuống cho phép người dùng lựa chọn
Cú pháp:
<select name = "name">
[<optgroup label = "label">]
<option [selected] value = "value">Text</option>
.......
[</optgroup>]
<option [selected] value = "value">Text</option>
.......
</select>
Ví dụ: Tạo trang web có combobox
<select name="browser">
<optgroup label="Firefox">
<option value="2.0 or higher">
Firefox 2.0 or higher
</option>
<option value="1.5.x">Firefox 1.5.x</option>
<option value="1.0.x">Firefox 1.0.x</option>
</optgroup>
<optgroup label="Microsoft Internet Explorer">
<option value="7.0 or higher">
Microsoft Internet Explorer 7.0 or higher
</option>
<option value="6.x">Microsoft Internet Explorer 6.x</option>
<option value="5.x">Microsoft Internet Explorer 5.x</option>
<option value="4.x">Microsoft Internet Explorer 4.x</option>
</optgroup>
<optgroup label="Opera">
<option value="9.0 or higher">Opera 9.0 or higher</option>
<option value="8.x">Opera 8.x</option>
<option value="7.x">Opera 7.x</option>
</optgroup>
<option>Safari</option>
<option>Other</option>
</select>