<!--

   function ax_bbox (nlat, wlon, slat, elon) {

      document.MapArea.bbox(nlat, wlon, slat, elon);

   }

   function ax_getBoundingBox () {

	   document.MapArea.calcbbox();

	   nlat = document.MapArea.NorthLat;
	   wlon = document.MapArea.WestLon;

	   slat = document.MapArea.SouthLat;
	   elon = document.MapArea.EastLon;

      return nlat + ':' + wlon + ':' + slat + ':' + elon;

   }

//-->