除了存储之前的状态，我不认为还有其他方法。 下面是使用jQuery的解决方案

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> 
<script type="text/javascript">
    var lastSelected;
    $(function () {
        //if you have any radio selected by default
        lastSelected = $('[name="myRadios"]:checked').val();
    });
    $(document).on('click', '[name="myRadios"]', function () {
        if (lastSelected != $(this).val() && typeof lastSelected != "undefined") {
            alert("radio box with value " + $('[name="myRadios"][value="' + lastSelected + '"]').val() + " was deselected");
        }
        lastSelected = $(this).val();
    });
</script>

<input type="radio" name="myRadios" value="1" />
<input type="radio" name="myRadios" value="2" />
<input type="radio" name="myRadios" value="3" />
<input type="radio" name="myRadios" value="4" />
<input type="radio" name="myRadios" value="5" />

在考虑了一会儿之后，我决定去掉变量并添加/删除类。这是我得到的:http://jsfiddle.net/BeQh3/2/

This is just off the top of my head, but you could do an onClick event for each radio button, give them all different IDs, and then make a for loop in the event to go through each radio button in the group and find which is was checked by looking at the 'checked' attribute. The id of the checked one would be stored as a variable, but you might want to use a temp variable first to make sure that the value of that variable changed, since the click event would fire whether or not a new radio button was checked.

这是最简单和最有效的函数，只需添加尽可能多的按钮到checked = false，并使每个单选按钮的onclick事件调用此函数。为每个收音机指定一个唯一的号码 按钮

function AdjustRadios(which) 
{
    if(which==1)
         document.getElementById("rdpPrivate").checked=false;
    else if(which==2)
         document.getElementById("rdbPublic").checked=false;
}

您可以添加以下JS脚本

<script>
    function myfunction(event) {
        alert('Checked radio with ID = ' + event.target.id);
    }
    document.querySelectorAll("input[name='myRadios']").forEach((input) => {
        input.addEventListener('change', myfunction);
    });
</script>

最简单和动力十足

使用getAttribute只读无线电输入

文件。addEventListener“输入”,(e) = > { 如果目标(e。“name”getAttribute () = = myRadios”) 控制台日志(e .目标。价值) }) <输入类型=“无线电 <输入类型=“无线电

var rad = document. myform . mybroadcasts; Var prev = null; For (var I = 0;I < rad.length;我+ +){ rad[我]。addEventListener('change'， function() { (上一页)?console.log (prev.value):空; If (this !== prev) { Prev = this; ｝ console.log (this.value) })； ｝ <表单名称= " myForm " > <input type="radio" name=" mybroadcasts " value="1" /> <input type="radio" name=" mybroadcasts " value="2" /> > < /形式

下面是一个JSFiddle演示:https://jsfiddle.net/crp6em1z/