顯示警報（）如果沒有單選按鈕被選中

Question

點擊按鈕「刪除」，如果選擇了沒有單選按鈕如何顯示一個警告後。我的html表格

<form name="Action" method="post" action="RequestAction"> 
        <table width="800px" cellpadding="5" style="color:black; border-top:1px solid #ccc;" border="0"> 
        </table> 
        <div id="container"> 
        <div id="demo_jui"> 
        <table id="requestList" class="display" cellpadding="0" cellspacing="0" border="0" style="font-size:12px;" > 
        <thead id="headed"> 
         <tr> 
          <th align="center" title="Employee">Employee</th> 
          <th align="center" title="Number of Days">Number of Days</th> 
          <th align="center" title="Start Date">Start Date</th> 
          <th align="center" title="End Date">End Date</th> 
          <th align="center" title="Leave Type">Leave Type</th> 
          <th align="center" title="Remark">Remark</th> 
          <th align="center">Approve</th> 
          <th align="center">Reject</th> 
         </tr> 
        </thead> 
        <tbody></tbody> 
        </table> 
        </div> 
        </div> 
         <table>     
         <tr> 
          <td style="padding-left:0px;" colspan="3"> 
           <a href="#"><img src="images/Submit.png" style="border:none;" onClick="javascript:Go()" 
           onmouseover="this.src='images/Submit_Hover.png'" onmouseout="this.src='images/Submit.png'"/></a> 
           &nbsp;&nbsp;&nbsp; 
           <a href="#"><img src="images/Reset.png" style="border:none;" onClick="javascript:clearForm()" 
           onmouseover="this.src='images/Reset_Hover.png'" onmouseout="this.src='images/Reset.png'"/></a> 
          </td> 
         </tr> 
        </table> 
       </form> 

單選按鈕值將在表格中檢索。當我測試了一下，如果沒有點擊任何選擇單選按鈕提交按鈕，我會得到錯誤

在功能圍棋（），是這樣的驗證單選按鈕是否正確？謝謝

function Go() { 
       if($('form[name=Action] input[name=statusList]:checked').length == 0) 
       { 
        $('form[name=Action]').submit(); 
       } 
       else 
       { 
        alert("Please select at least one to delete"); 
       } 
      } 

Answer 1

也許檢查「checked」狀態不起作用？

//read value of radio button 
alert($("input[name='radio-button-group']:checked").val()); 

//get bool, if radio button is checked 
alert(typeof $("input[name='radio-button-group']:checked").val() != 'undefined'); 

源（德國）：http://mabraham.de/jquery-radio-buttons-auslesen-und-manipulieren/

Answer 2

使用下面的代碼片段

var IsChecked = $('take id or classname of radiogroup').is(':checked'); 

if(!IsChecked) 
{ 
alert("select some thing"); 
}