Restrict Checkboxlist To Single Selection

How we can restrict checkboxlist to single selection

(Or)

How we can do checkboxlist behaves like a radiobuttonlist

Javascript Code:

<script type = "text/javascript">

    function MutExChkList(chk)

    {

        var chkList = chk.parentNode.parentNode.parentNode;

        var chks = chkList.getElementsByTagName("input");

        for(var i=0;i<chks.length;i++)

        {

            if(chks[i] != chk && chk.checked)

            {

                chks[i].checked=false;

            }

        }

    }

</script>

Design View of the CheckBoxList:

                <asp:CheckBoxList ID="cblSelect" runat="server" RepeatLayout="Flow" >

                <asp:ListItem Text="Yes" Value="Y" onclick="MutExChkList(this);" ></asp:ListItem>

                <asp:ListItem Text="No" Value="N" onclick="MutExChkList(this);"></asp:ListItem>

                </asp:CheckBoxList>

All the best,

Prakash