jquery . fancybox()

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;  98%; height: 100%;" >
                    <thead>
                        <tr>
                            <th>序号</th>
                            <th >议题名称</th>
                        </tr>
                    </thead>
                    <tbody >
                        <c:forEach var="vft" items="${VoteFormTopices}" varStatus="status">
                            <tr>
                                <td style="text-align: center;"  >${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(); 
}