Java.前端.Layer.open.btn验证无效

  var index = layer.open({
                    type: 2,
                    area: [width + ‘px‘, height + ‘px‘],
                    fix: false,
                    //不固定
                    maxmin: true,
                    shade: 0.3,
                    title: title,
                    content: url,
                    btn: [‘保存‘, ‘提交‘, ‘取消‘],
                    yes: function(index, layero) {
                        var iframeWin = layero.find(‘iframe‘)[0];
                          iframeWin.contentWindow.submitHandler(0);
                    },
                    btn2: function(index, layero) {
                        var iframeWin = layero.find(‘iframe‘)[0];
                          iframeWin.contentWindow.submitHandler(1);
                          return false; //就是这里好扑街！记得加上return false!!!!
                    },
                    btn3: function(index, layero) {
                          return true;
                    },
                    cancel: function(index) {
                        return true;
                    },