$.ajax({
                        url:"${ctx}/exer/example/form",
                        type: "post",
                        data: data,
                        async: false,
                        dataType: 'html',
                        beforeSend : function(XMLHttpRequest) {
                            
                        },
                        complete : function(XMLHttpRequest, textStatus) {
                            
                        },
                        success: function(result){
                            top.layer.open({
                                scrollbar: false,
                                 title: '新增',
                                content: result,
                                area: ['500px', '400px'],
                                btn : ['保存','取消'],
                                yes: function(index, layero){
                                
                                  $("#ex").submit();
                                 },btn2: function(index, layero){
                                   //按钮【按钮二】的回调
                                 },cancel: function(){ 
                                     top.layer.close(index);
                                 }
                            });
                        },
                        error: function(XMLHttpRequest,textStatus,errorThrown){
                              alert(XMLHttpRequest.status);
                        }
                    });