判断Repeater 下嵌套绑定的CheckBoxList和RadioButtonList控件是否选中（答题）

js验证Repeater 下嵌套绑定的CheckBoxList和RadioButtonList控件每组中是否有至少1个被选中。

CheckBoxList默认显示成表格结构 设置RepeatLayout="UnorderedList"让其生成的代码为如下结构。

 <dd>
 <span id="ContentPlaceHolder1_repList_RadList_1">
<input id="ContentPlaceHolder1_repList_RadList_1_0_1" type="radio" name="ctl00$ContentPlaceHolder1$repList$ctl02$RadList" value="A" />
<label for="ContentPlaceHolder1_repList_RadList_1_0_1">111</label>
<input id="ContentPlaceHolder1_repList_RadList_1_1_1" type="radio" name="ctl00$ContentPlaceHolder1$repList$ctl02$RadList" value="B" />
<label for="ContentPlaceHolder1_repList_RadList_1_1_1">222</label>
<input id="ContentPlaceHolder1_repList_RadList_1_2_1" type="radio" name="ctl00$ContentPlaceHolder1$repList$ctl02$RadList" value="C" />
<label for="ContentPlaceHolder1_repList_RadList_1_2_1">333</label>
</span>
</dd>

<asp:CheckBoxList ID="CheckBoxList1" runat="server" RepeatLayout="UnorderedList">
 </asp:CheckBoxList>

<script type="text/javascript">
    $(document).ready(function () {
        $("#form1").submit(function () {
            var counts = 0;
            $("dd span").each(function () {
                var fload = false;
                var nodes = this.childNodes;
                for (var i = 0; i < nodes.length; i++) {
                    if (nodes[i].type == "radio"||nodes[i].type=="checkbox") {
                        if (nodes[i].checked) {
                            fload = true;
                        }
                    }
                }
                if (fload) {
                    counts++;
                }
            });
             counts = $("dd").length - counts;
            if (counts > 0) {  
                alert("您有" + counts + "题未答！");
                return false;
            }
        });
    });
</script>