在JavaScript中，可通过检查单选框的checked属性是否为true来判断其是否被选中，对多个单选框可采用for循环逐一检测，进而实现状态判断功能。 3、 在表单中添加三个类型为radio的输入项，分别为其设置唯一的id，以便后续通过id获取对应的input元素对象，实现选项的独立控制与操作。

Of all the hats JavaScript can wear, its form-processing features are among the most sought and used. Learn how to use JavaScript for form processing, validation, and more. Forms are an essential part ...

Some call it magic -- the ability to make objects appear suddenly out of nowhere. You can create this kind of magic on your website using a few lines of JavaScript ...