jqurey 遍历 div内的所有input单选复选按钮并判断是否选中

<ul>
                            @{
                    foreach (var item in vote)
                    {
                        if (!string.IsNullOrEmpty(item.Img))
                        {
                            <li class="vop">
                                @if (!string.IsNullOrEmpty(item.VoteText))
                                {
                                    <a href="votedetail?cid=@classid&no=@item.Id">
                                        <img src="@item.Img" />
                                    </a>
                                }
                                else
                                {
                                    <img src="@item.Img" />
                                }
                                <div class="votesubject">
                                    <input id="@item.Id" name="votetitle" value="@item.VoteNum" type="@_votetype" />
                                    @if (!string.IsNullOrEmpty(item.VoteText))
                                    {
                                        <a href="votedetail?cid=@classid&no=@item.Id">
                                            <span>@item.Title</span>
                                        </a>
                                    }
                                    else
                                    {
                                        <span>@item.Title</span>
                                    }
                                </div>

                            </li>
                        }
                        else
                        {
                            <li class="vopn">
                                <input id="@item.Id" name="votetitle" value="@item.VoteNum" type="@_votetype" />
                                @if (!string.IsNullOrEmpty(item.VoteText))
                                {
                                    <a href="votedetail?cid=@classid&no=@item.Id">
                                        <span class="vvpt">@item.Title</span>
                                    </a>
                                }
                                else
                                {
                                    <span class="vvpt">@item.Title</span>
                                }
                            </li>

                        }
                    }
                            }
                        </ul>

$(window).ready(function () {
      $("#tj").click(function () {
        //$(".votesubject").find("input").each(function () {
        //    if ($(this).prop(‘checked‘, true)) {
        //        alert($(this).prop("value"))
        //    }
        //  });
        var ids = "";
        var votes = "";
        var votenum;
        var ischeck = true;
        $("input[name=votetitle]").each(function () {
            //if (this.checked) {
            //    alert($(this).val());
            //}          
            var radios = $(this);          
            for (i = 0; i < radios.length; i++) {
                if (radios[i].checked) {                  
                    votenum = parseInt(radios[i].value)+1;                  
                    votes += votenum + "@";                  
                    ids+=$(this).attr("id")+"@"
                    ischeck = false;
                }
            }
        });
        if (ischeck) {
            alert("请勾选选项后再进行提交");
            return false;
        }
        if (!ischeck) {
            if (ids.length > 1) {
                ids = ids.substring(0, ids.length - 1);
            }
            if (votes.length > 1) {
                votes = votes.substring(0, votes.length - 1);
            }          
            $("#votenum").val(votes);
            $("#ids").val(ids);
            alert("感谢您的参与。");
            $("#form1").submit();
        }
    });
    $("#ck").click(function () {
        window.location = "voteview?cid= " + $("#classid").val() + "&id=" + $("#vid").val() + " ";
    });
});