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HTML <option>标签
作者:w3pop.com
翻译/整理:w3pop.com
发布:2007-04-28
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定义与用法
The option element defines an option in the drop-down list.
option元素定义了下拉列表的可选项目
在HTML和XHTML中的区别
In HTML the <option> tag has no end tag.
HTML中<option>标签不需要关闭
In XHTML the <option> tag must be properly closed.
在XHTML中<option>标签必须合理关闭
提示与注意点
Note: The <option> tag can be used without any attributes, but you usually need the value attribute, which indicates what is sent to the server.
注意：<option>标签不需要任何属性，但一般情况下应该需要value属性，这可以表明发送给服务器的是什么值
Note: Use this tag in conjunction with the select element, elsewhere it is meaningless.
注意：这个标签应该和select元素一起使用，不然它一点意义也没有
实例
| 代码 | 输出 |
|---|---|
| <select> <option value ="volvo">Volvo</option> <option value ="saab">Saab</option> <option value ="opel" selected="selected">Opel</option> <option value ="audi">Audi</option> </select> |
可选属性
DTD indicates in which DTD the attribute is allowed. S=Strict, T=Transitional, and F=Frameset.
下表中的DTD列指明了被支持的DTD属性。S=Strict（精确的），T=Transitional（传统的），F=Frameset（框架）
| 属性 | 值 | 描述 | DTD |
|---|---|---|---|
| disabled | disabled | Specifies that the option should be disabled when it first loads 当它第一次被加载的时候可选项不可用 |
STF |
| label | text | Defines a label to use when using <optgroup> 当使用<optgroup>时定义一块标签 |
STF |
| selected | selected | Specifies that the option should appear selected (will be displayed first in the list) 指定为默认选中的项目 |
STF |
| value | text | Defines the value of the option to be sent to the server 定义可选项发送到服务器上的值 |
STF |
标准属性
| id, class, title, style, dir, lang, xml:lang, tabindex |
For a full description, go to Standard Attributes.
查看完整的属性
事件属性
| onclick, ondblclick, onmousedown, onmouseup, onmouseover, onmousemove, onmouseout, onkeypress, onkeydown, onkeyup |
For a full description, go to Event Attributes.
查看完整的属性
尝试与演示
Simple drop down box
How to create a simple drop-down box on an HTML page. A drop-down box is a selectable list.
如何在HTML中建立简单的下拉框。
Another drop down box
How to create a simple drop-down box with a pre-selected value.
如何建立带有预选值的下拉框
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