重置按钮

this.getForm().reset();if(this.updateFlag) {var promotionExamPanel = Ext.getCmp('promotionExamPanel');var sm = promotionExamPanel.grid.getSelectionModel(),record = sm.getSelected();promotionTypeCheckboxGroup.reset();this.form.loadRecord(record);var vals = record.data.promotion_scope.split(",");promotionTypeCheckboxGroup.items.each(function(item){        for (var i = 0,length= vals.length;i<length;i++ ){        if(vals[i]==item.inputValue){         item.setValue(true);        }        }    });}else {//新增this.getForm().setValues({'exam_type': 1,'exam_status': 0});}