通过javascript从radiobuttonlist获取价值？

Question

我有一个radibutton列表.

          <asp:RadioButtonList ID="RadioButtonList1" runat="server" 
              RepeatDirection="Horizontal" RepeatLayout="flow" >
             <asp:ListItem Selected="True" Text ="Yes" Value="0"></asp:ListItem>
             <asp:ListItem  Text ="No" Value="1"></asp:ListItem>
          </asp:RadioButtonList>

为了从无线电列表中获取值,我有一个功能:

 function getvalueofradiolist() {

        var radiolist = document.getElementById('<%= RadioButtonList1.ClientID %>');
        var rblName = radiolist.name;
        var radio = document.getElementsByName(rblName);

        for (var x = 0; x < radio.length; x++) {
            if (radio[x].checked) {
                alert("Selected item Value " + radio[x].value);
            }
        }
    }

但它返回undefined.

我写错了吗？

我点击按钮调用此功能.

建议我如果我可以在Javascript的帮助下使用代码来做到这一点.

Answer 1

<form runat="server">
<asp:RadioButtonList ID="RadioButtonList1" runat="server" 
          RepeatDirection="Horizontal" RepeatLayout="flow" >
         <asp:ListItem Selected="True" Text ="Yes" Value="0"></asp:ListItem>
         <asp:ListItem  Text ="No" Value="1"></asp:ListItem>
      </asp:RadioButtonList>    </form>
<p id="button" onclick="getvalue()">click me</p>

<script type="text/javascript">
function getvalue(){
 alert($('#<%=RadioButtonList1.ClientID %> input[type=radio]:checked').val());
}
</script>