重写保存按钮save事件

_saveActionEventHandler:function(event,value){
            if (!_self.fireEvent("saveBefore")) return;
            var option = _self.getOptionFromArguments(arguments);
            _self.fireEvent("fieldOnStoreEvent");
                        //更改保存的数据
             _self._model.number = 123;
                        var editModel = waf.toJSONString(_self.getCurrentModel());
            option.action = "save";
            if (option&&option.data){
                option.data.model=editModel;            
            }    
            else{
                option.data = {
                    model:editModel
                }
            }
            option.success = option&&option.success?option.success:function(objectPK){
                _self.showInfo(waf.dynamicEdit.info.savesuccess);
                document.location.href = listUrl;
            }
            waf.doPost(option);    
        }
    });
    //注册数据保存事件 
    _self.subscribeEvent("saveActionEvent", _private._saveActionEventHandler,"overwrite");​