加3年

@@ -2519,7 +2519,8 @@ Page({
             this.showToast('请先完善子女生日信息')
             return
           } else{
-            var year = this.data.commonbirthDate.selected.substring(0, 4) - 3
+            var year = this.data.commonbirthDate.selected.substring(0, 4) 
+            year = parseInt(year) + 3
             var month = this.data.commonbirthDate.selected.substring(4, 7)
             this.handleStartDate(year+month, true)  //处理受教育时间起的逻辑
           }