问题陈述很简单。我需要看看用户是否从无线电组中选择了一个单选按钮。组中的每个单选按钮共享相同的id。

问题是我无法控制表单是如何生成的。下面是单选按钮控件代码的样例代码:

<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 >

除此之外,当单选按钮被选中时,它不会添加一个“checked”属性到控件中,只是文本检查(我猜只是没有值的属性检查)。下面是选定的无线电控件的外观

<input type="radio" checked 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 >

有人能帮助我用jQuery代码,可以帮助我得到选中单选按钮的值吗?


当前回答

在代码中,jQuery只查找输入的第一个实例 名称为q12_3,在本例中为1。你想要一个 输入名称为q12_3,即:已检查。

$(function(){
    $("#submit").click(function() {     
        alert($("input[name=q12_3]:checked").val());
    });
});

注意,上面的代码与使用的不一样 .(":检查")。 jQuery的是() 函数返回一个布尔值(true或false),而不是 元素。

其他回答

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();

只看名字

$(function () {
    $('input[name="EventType"]:radio').change(function () {
        alert($("input[name='EventType']:checked").val());
    });
});
<div id="subscriptions">
 Company Suscription: <input type="radio" name="subsrad" value="1">
 Customer Subscription:<input type="radio" name="subsrad" value="2">
 Manully Set:<input type="radio" name="subsrad" value="MANUAL">
 NO Subscription:<input type="radio" name="subsrad" value="0">
 </div>

和处理jquery警报的值设置/通过div id更改:

$("#subscriptions input") // select the radio by its id
    .on('change', function(){ // bind a function to the change event
    alert($('input[name="subsrad"]:checked', '#subscriptions').val());
            });

这是如此简单....:-}

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/>

$("#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 (){...});).