function seasonalBackground(node,images)
      {

        switch(new Date().getMonth())
        {
          case 2: case 3: case 4:
            img = 1;
            break;
          case 5: case 6: case 7:
            img = 2;
            break;
          case 8: case 9: case 10:
            img = 3;
            break;
          default:
            img = 0;
        }

        node.style.backgroundImage = "url(\""+images[img]+"\")";
             
      }