input属性radio中checked不生效的实例详解

同一个页面中有许多地方都用到了单选按钮并设置了默认选中 , 结果在运行的时候发现单选按钮没有被默认选中

由于是复制然后修改个别属性 ,然后直接使用的 , 所以name值忘记修改了 , 单选框是根据name来判断选中 .

修改前 类似这样:

由于是多个地方使用单选按钮 , 将所有使用了单选按钮的p同时显示出来 , 效果类似下面:

代码类似下面这样代码(两组单选按钮 , 设置的name属性相同 , 两组分别设置了默认选中 , 结果只默认选中最后一组的设置了默认选中的按钮):

<span style="color: #000000">男性：</span><span style="color: #0000ff"><</span><span style="color: #800000">input </span><span style="color: #ff0000">type</span><span style="color: #0000ff">="radio"</span><span style="color: #ff0000"> checked</span><span style="color: #0000ff">="checked"</span><span style="color: #ff0000"> name</span><span style="color: #0000ff">="Sex"</span><span style="color: #ff0000"> value</span><span style="color: #0000ff">="male"</span> <span style="color: #0000ff">/></span><span style="color: #0000ff"><</span><span style="color: #800000">br </span><span style="color: #0000ff">/></span><span style="color: #000000">女性：</span><span style="color: #0000ff"><</span><span style="color: #800000">input </span><span style="color: #ff0000">type</span><span style="color: #0000ff">="radio"</span><span style="color: #ff0000"> name</span><span style="color: #0000ff">="Sex"</span><span style="color: #ff0000"> value</span><span style="color: #0000ff">="female"</span> <span style="color: #0000ff">/></span><span style="color: #0000ff"><</span><span style="color: #800000">br</span><span style="color: #0000ff">/><br/><</span><span style="color: #800000">br</span><span style="color: #0000ff">/></span><span style="color: #000000">男性：</span><span style="color: #0000ff"><</span><span style="color: #800000">input </span><span style="color: #ff0000">type</span><span style="color: #0000ff">="radio"</span><span style="color: #ff0000"> checked</span><span style="color: #0000ff">="checked"</span><span style="color: #ff0000"> name</span><span style="color: #0000ff">="Sex"</span><span style="color: #ff0000"> value</span><span style="color: #0000ff">="male"</span> <span style="color: #0000ff">/></span><span style="color: #0000ff"><</span><span style="color: #800000">br </span><span style="color: #0000ff">/></span><span style="color: #000000">女性：</span><span style="color: #0000ff"><</span><span style="color: #800000">input </span><span style="color: #ff0000">type</span><span style="color: #0000ff">="radio"</span><span style="color: #ff0000"> name</span><span style="color: #0000ff">="Sex"</span><span style="color: #ff0000"> value</span><span style="color: #0000ff">="female"</span> <span style="color: #0000ff">/></span>

 

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