<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>