RadioButton 在 DataList 中的绑定问题

    <script language="javascript" type="text/javascript">
        function clickit() {
                var dom=document.all;
                var el=event.srcElement;
                if(el.tagName=="INPUT"&&el.type.toLowerCase()=="radio")
                {
                        for(i=0;i<dom.length;i++)
                        {
                                if(dom[i].tagName=="INPUT"&&dom[i].type.toLowerCase()=="radio")
                                {
                                        dom[i].checked=false;
                                }
                        }
                }
                el.checked=true;
        }
    </script>

 

            <asp:DataList ID="TestDataList" runat="server" RepeatColumns="3">
                <ItemTemplate>
                    <asp:RadioButton ID="RadioButton1" runat="server" Text='<%# Eval("Model_name") %>'
                        onclick="clickit();" />
                </ItemTemplate>
            </asp:DataList>