fix obj

@@ -174,10 +174,10 @@ var operationEdit={
             }
             }
         }
         }
     },    
     },    
-    selectOneOption:function(){
+    selectOneOption:function(_sel){
         var firstGroup=$("#tab_body>.row").find(".form-group:eq(0)");
         var firstGroup=$("#tab_body>.row").find(".form-group:eq(0)");
         firstGroup.nextAll().remove();      
         firstGroup.nextAll().remove();      
-        var selectKey=$("#tab_body>#promotionType").val();
+        var selectKey=_sel.val();
         var _html;
         var _html;
         var _selectObj;
         var _selectObj;
         switch(selectKey){
         switch(selectKey){
@@ -217,7 +217,7 @@ var operationEdit={
     bindEvent:function(){
     bindEvent:function(){
         var _g=this;        
         var _g=this;        
         $(document).on('click','#save',function(){return this.save()}); 
         $(document).on('click','#save',function(){return this.save()}); 
-        $("#promotionType").change(function(){return _g.selectOneOption()});        
+        $("#promotionType").change(function(){return _g.selectOneOption(this)});        
     },
     },
     save:function(){
     save:function(){
             var e=this.edit;            
             var e=this.edit;