我使用展开运算符和some来检查数组中至少有一个元素通过了测试。

我为谁分担关心。

var checked =[..文档.getElementsByName(“性别”).有些(c=>c.checked); 控制台日志(检查); <输入类型=“收音机”，性别“检查值=“男性”/> Male <输入类型=“无线电”

这也是可行的，避免调用元素id，而是将其作为数组元素调用。

下面的代码是基于这样一个事实:一个名为radiobuttons组的数组是由radiobuttons元素组成的，它们的顺序与html文档中声明的相同:

if(!document.yourformname.yourradioname[0].checked 
   && !document.yourformname.yourradioname[1].checked){
    alert('is this working for all?');
    return false;
}

mootools (http://mootools.net/docs/core/Element/Element)

html:

<input type="radio" name="radiosname" value="1" />
<input type="radio" name="radiosname" value="2" id="radiowithval2"/>
<input type="radio" name="radiosname" value="3" />

js:

// Check if second radio is selected (by id)
if ($('radiowithval2').get("checked"))

// Check if third radio is selected (by name and value)
if ($$('input[name=radiosname][value=3]:checked').length == 1)


// Check if something in radio group is choosen
if ($$('input[name=radiosname]:checked').length > 0)


// Set second button selected (by id)
$("radiowithval2").set("checked", true)

一种简单的JavaScript方式

var radios = document.getElementsByTagName('input');
var value;
for (var i = 0; i < radios.length; i++) {
    if (radios[i].type === 'radio' && radios[i].checked) {
        // get value, set checked flag or do whatever you need to
        value = radios[i].value;       
    }
}

http://www.somacon.com/p143.php/

function getCheckedValue(radioObj) {
    if(!radioObj)
        return "";
    var radioLength = radioObj.length;
    if(radioLength == undefined)
        if(radioObj.checked)
            return radioObj.value;
        else
            return "";
    for(var i = 0; i < radioLength; i++) {
        if(radioObj[i].checked) {
            return radioObj[i].value;
        }
    }
    return "";
}

只是对马克·比克做了一点点修改;

HTML代码

<form name="frm1" action="" method="post">
  <input type="radio" name="gender" id="gender_Male" value="Male" />
  <input type="radio" name="gender" id="gender_Female" value="Female" / >
  <input type="button" value="test"  onclick="check1();"/>
</form>

和Javascript代码来检查单选按钮是否被选中

<script type="text/javascript">
    function check1() {            
        var radio_check_val = "";
        for (i = 0; i < document.getElementsByName('gender').length; i++) {
            if (document.getElementsByName('gender')[i].checked) {
                alert("this radio button was clicked: " + document.getElementsByName('gender')[i].value);
                radio_check_val = document.getElementsByName('gender')[i].value;        
            }        
        }
        if (radio_check_val === "")
        {
            alert("please select radio button");
        }        
    }
</script>