如何选择默认的单选按钮？ [英] How to select a radio button by default?

问题描述

我有一些单选按钮，我希望在加载页面时默认设置其中一个按钮。

I have some radio buttons and I want one of them to be set as selected by default when the page is loaded. How can I do that?

<input type="radio" name="imgsel"  value=""  /> 

推荐答案

XHTML解决方案：

XHTML solution:

<input type="radio" name="imgsel" value="" checked="checked" />

请注意，已检查的实际值属性实际上并不重要;这只是一个约定来分配checked。最重要的是，像true或false这样的字符串没有任何特殊含义。

Please note, that the actual value of checked attribute does not actually matter; it's just a convention to assign "checked". Most importantly, strings like "true" or "false" don't have any special meaning.

如果您不打算达到XHTML一致性，您可以简化代码：

If you don't aim for XHTML conformance, you can simplify the code to:

<input type="radio" name="imgsel" value="" checked>

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