無法訪問單選按鈕列表的設定值

Question

我有一個單選按鈕列表

<asp:RadioButtonList CssClass="radioLable" ID="rbListPointsCat" runat="server" RepeatDirection="Horizontal" 
        AutoPostBack="true" OnSelectedIndexChanged="rbListPointsCat_SelectedIndexChanged"> 
        <asp:ListItem runat="server" Value="Yes" /> 
        <asp:ListItem runat="server" Value="No" /> 
       </asp:RadioButtonList> 

我使用以下JS功能

  function CheckValue(sender, args) { 

     var rblist = document.getElementById('<% =rbListPointsCat.ClientID%>'); 
     for (var x = 0; x < rblist.cells.length; x++) { 
      if (rblist.cells[x].checked) { 
       var Choice = (rblist.cells[x].innerText); 
       alert(Choice); 
      } 
     } 


     if (Choice=="No") { 
      if (txtRemarks.value == "") { 
       args.IsValid = false; 
      } 
      else { 
       args.IsValid = true; 
      } 
     } 
     else { 
      args.IsValid = true; 
     } 
    } 

，但無法獲得檢查valur..it即將未定義。 請讓我知道我哪裏錯了？

Answer 1

叫它的名字，

 function CheckValue(sender, args) { 

    var rblist = document.getElementByName('<% =rbListPointsCat.ClientID%>'); 
    for (var x = 0; x < rblist.cells.length; x++) { 
     if (rblist.cells[x].checked) { 
      var Choice = (rblist.cells[x].innerText); 
      alert(Choice); 
     } 
    } 


    if (Choice=="No") { 
     if (txtRemarks.value == "") { 
      args.IsValid = false; 
     } 
     else { 
      args.IsValid = true; 
     } 
    } 
    else { 
     args.IsValid = true; 
    } 
}