pt>
      /*
       * Compute the style of the feature.  Here we want the opacity of polygons to
       * be based on the offset from local noon.  For example, a timezone where it is
       * currently noon would have an opacity of 0.75.  And a timezone where it is
       * currently midnight would have an opacity of 0.  This doesn't account for
       * daylight savings, so don't use it to plan your vacation.
       */
      var styleFunction = function(feature) {
        var offset = 0;
        var name =