i can not see Y

@@ -148,7 +148,8 @@ var operationEdit={
             this.promotionId=config.promotionId
         }
         _e.init();
-        this.bindEvent();
+        this.bindSaveEvent();
+        this.bindChangeEvent();
     },
     template:function(_htmlObj,_data){
         if(_data&_data.param_list){
@@ -173,11 +174,7 @@ var operationEdit={
                 _htmlObj.last().append(_html);
             }
         }
-    },
-    bindEvent:function(){
-        $(document).on('click','#save',function(){return this.save()});
-        $(document).on('change','#promotionType',function(){return this.selectOne()});
-    },
+    },    
     selectOne:function(){
         var firstGroup=$("#tab_body>.row").find(".form-group:eq(0)");
         firstGroup.nextAll().remove();      
@@ -218,6 +215,12 @@ var operationEdit={
         }
         this.template(firstGroup,_selectObj);
     },
+    bindSaveEvent:function(){        
+        $(document).on('click','#save',function(){return this.save()});        
+    },
+    bindChangeEvent:function(){
+        $(document).on('change','#promotionType',function(){return this.selectOne()});
+    },
     save:function(){
             var e=this.edit;            
             e.submit(this.action, function (option) {