function chooseTopic(btn) {//选择议题

        $.fancybox({

            type : 'iframe',

            href : '',

            fitToView : false,

            width : '800',

            height : '420',

            overlayShow : false,

            autoSize : false,

            closeClick : false,

            openEffect : 'none',

            closeEffect : 'none',

            beforeClose : function() {

                var topicId = $(".fancybox-iframe").contents().find("#topicId").val();传递子页面的数值

                var topicName = $(".fancybox-iframe").contents().find("#topicName").val();传递子页面的数值

                   $(btn).val(topicName);

            }

        });

    }

           <form  >

                <table style="margin-top: 4px; width: 98%; height: 100%;" >

                    <thead>

                        <tr>

                            <th>序号</th>

                            <th >议题名称</th>

                        </tr>

                    </thead>

                    <tbody >

                        <c:forEach var="vft" items="${VoteFormTopices}" varStatus="status">

                            <tr>

                                <td style="text-align: center;" id="sortIndex" >${status.index + 1}</td>

                                <td ><a href="#" onclick="javascript:chooseTopic(this);" topicId="${vft.topic.id}" 
                                       topicName="${vft.topic.name}"> ${vft.topic.name}</a>
                                </td>

                            </tr>

                        </c:forEach>

                    </tbody>

                </table>

            </form>

function chooseTopic (obj) {

    $("#topicId").val($(obj).attr("topicId"));

    $("#topicName").val($(obj).attr("topicName"));

    window.parent.$.fancybox.close();

}