code: function() {
          var projCode = this.projection.getCode();
          return parseFloat(this.params.VERSION) >= 1.3 && 
              !!(this.yx[projCode] || (OpenLayers.Projection.defaults[projCode] && 
              OpenLayers.Projection.defaults[projCode].yx));
      }
docs: APIMethod: reverseAxisOrder
  Returns true if the axis order is reversed for the WMS version and
  projection of the layer.
  
  Returns:
  {Boolean} true if the axis order is reversed, false otherwise.