this 引起的bug

@@ -1267,7 +1267,7 @@ Page({
               commonbirthDate: that.data.commonbirthDate
             }
             if (format.getAge(birth_day) < 3) {
-              this.showToast('子女年龄小于3岁,不可申报')
+              that.showToast('子女年龄小于3岁,不可申报')
             }
           } else if (that.idcard_belong == 'spouse_id_card_no') {
             that.data.loverbirthDate.selected = birth_day
@@ -1286,7 +1286,7 @@ Page({
               olderbirthDate: that.data.olderbirthDate
             }
             if (format.getAge(birth_day) < 60) {
-              this.showToast('被赡养人年龄不足60岁,不可申报')
+              that.showToast('被赡养人年龄不足60岁,不可申报')
             }
           } else if (that.idcard_belong == 'medical_id_card_no') {
             that.data.commonbirthDate.selected = birth_day