<input type="radio" name='s_2_1_6_0' value='Mail copy to my bill to address' id = "InvCopyRadio" onchange = 'SWESubmitForm(document.SWEForm2_0,s_4,"","1-DPWJJF")' style="height:20;width:25" tabindex=1997 >

$(function() {
      $("#submit").click(function() {
        alert($('input[name=s_2_1_6_0]:checked').val());
      });
    });`

请参阅下面的工作示例，其中包含与不同部分相关联的无线电组集合。您的命名方案很重要，但理想情况下，您应该尝试对输入使用一致的命名方案(特别是当它们位于像这里这样的部分时)。

$('#submit').click(function(){ var section = $('input:radio[name="sec_num"]:checked').val(); var question = $('input:radio[name="qst_num"]:checked').val(); var selectedVal = checkVal(section, question); $('#show_val_div').text(selectedVal); $('#show_val_div').show(); }); function checkVal(section, question) { var value = $('input:radio[name="sec'+section+'_r'+question+'"]:checked').val() || "Selection Not Made"; return value; } * { margin: 0; } div { margin-bottom: 20px; padding: 10px; } h5, label { display: inline-block; } .small { font-size: 12px; } .hide { display: none; } #formDiv { padding: 10px; border: 1px solid black; } .center { display:block; margin: 0 auto; text-align:center; } <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="center"> <div> <h4>Section 1</h4> <h5>First question text</h5> <label class="small"><input type="radio" name="sec1_r1" value="(1:1) YES"> YES</label> <label class="small"><input type="radio" name="sec1_r1" value="(1:1) NO"> NO</label> <br/> <h5>Second question text</h5> <label class="small"><input type="radio" name="sec1_r2" value="(1:2) YES"> YES</label> <label class="small"><input type="radio" name="sec1_r2" value="(1:2) NO"> NO</label> <br/> <h5>Third Question</h5> <label class="small"><input type="radio" name="sec1_r3" value="(1:3) YES"> YES</label> <label class="small"><input type="radio" name="sec1_r3" value="(1:3) NO"> NO</label> </div> <div> <h4>Section 2</h4> <h5>First question text</h5> <label class="small"><input type="radio" name="sec2_r1" value="(2:1) YES"> YES</label> <label class="small"><input type="radio" name="sec2_r1" value="(2:1) NO"> NO</label> <br/> <h5>Second question text</h5> <label class="small"><input type="radio" name="sec2_r2" value="(2:2) YES"> YES</label> <label class="small"><input type="radio" name="sec2_r2" value="(2:2) NO"> NO</label> <br/> <h5>Third Question</h5> <label class="small"><input type="radio" name="sec2_r3" value="(2:3) YES"> YES</label> <label class="small"><input type="radio" name="sec2_r3" value="(2:3) NO"> NO</label> </div> <div> <h4>Section 3</h4> <h5>First question text</h5> <label class="small"><input type="radio" name="sec3_r1" value="(3:1) YES"> YES</label> <label class="small"><input type="radio" name="sec3_r1" value="(3:1) NO"> NO</label> <br/> <h5>Second question text</h5> <label class="small"><input type="radio" name="sec3_r2" value="(3:2) YES"> YES</label> <label class="small"><input type="radio" name="sec3_r2" value="(3:2) NO"> NO</label> <br/> <h5>Third Question</h5> <label class="small"><input type="radio" name="sec3_r3" value="(3:3) YES"> YES</label> <label class="small"><input type="radio" name="sec3_r3" value="(3:3) NO"> NO</label> </div> </div> <div id="formDiv" class="center"> <form target="#show_val_div" method="post"> <p>Choose Section Number</p> <label class="small"> <input type="radio" name="sec_num" value="1"> 1</label> <label class="small"> <input type="radio" name="sec_num" value="2"> 2</label> <label class="small"> <input type="radio" name="sec_num" value="3"> 3</label> <br/><br/> <p>Choose Question Number</p> <label class="small"> <input type="radio" name="qst_num" value="1"> 1</label> <label class="small"> <input type="radio" name="qst_num" value="2"> 2</label> <label class="small"> <input type="radio" name="qst_num" value="3"> 3</label> <br/><br/> <input id="submit" type="submit" value="Show Value"> </form> <br/> <p id="show_val_div"></p> </div> <br/><br/><br/>

甚至输入也不是必要的，正如其他答案所建议的那样。 下面的代码也可以使用:

var variable_name = $("[name='radio_name']:checked").val();

获取选中单选按钮值的最简单方法如下:

$("input[name='optradio']:checked").val();

选择器之间不应使用空格。

举个例子

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1  /jquery.min.js"></script>
<form id="myForm">
<input type="radio" name="radio" value="first"/> 1 <br/>
<input type="radio" name="radio" value="second"/> 2 <br/>
</form>



<script>
$(document).ready(function () {
    $('#myForm').on('click', function () {
        var value = $("[name=radio]:checked").val();

        alert(value);
    })
});
</script>

$("#radioID") // select the radio by its id
    .change(function(){ // bind a function to the change event
        if( $(this).is(":checked") ){ // check if the radio is checked
            var val = $(this).val(); // retrieve the value
        }
    });

确保将其包装在DOM就绪函数中($(function(){…});美元(文档)时的功能 (){...});).