var count = "${count}";

                for(var i=1;i<=count;i++){

                       var flag = false;

                       if($("input[class='optionId"+i+"']:checked").length > 0){

                            flag = true;

                       }

                       if(flag==false){

                             alert("第 "+i+" 题未作答，请选择答案！");

                             return false;

                       }

                }

<c:forEach items="${list}" var="risk" varStatus="status">

                    <div class="pg_item">

                        <div class="pgt_bt">

                            ${status.index+1}、<input type="text" name="title"

                                value="${risk.title }" /> <input type="hidden" name="stemId"

                                value="${risk.id }" /> <input type="hidden" name="type"

                                value="${risk.type }" />

                        </div>

                        <c:forEach items="${risk.option}" var="option" varStatus="optionStatus">

                            <label class="pgt_list">

                                <c:if test="${risk.type == 1}">

                                    <input type="radio" name="optionId${status.index}" class="optionId${status.index+1}"  value="${option.id}">${option.content}

                                </c:if>

                                <c:if test="${risk.type == 2}">

                                    <input type="checkbox" name="optionId${status.index}" class="optionId${status.index+1}"  value="${option.id}">${option.content}

                                </c:if>

                            </label>

                        </c:forEach>

                    </div>

                </c:forEach>