code: function(_event,_type,_name){
          var _key1 = 'page'+_type;
          return _event[_key1]!=null?_event[_key1]:(
              _event['client'+_type]+
              _e._$getPageBox()['scroll'+_name]
          );
      }
docs: /*
  取鼠标相对于BODY的偏移
  @param  {Event}  事件对象
  @param  {String} 类型，X/Y
  @param  {String} 滚动偏移名称，Left/Top
  @return {Void}