if( document.images )
{
  but64 = new Image(12,20);
  but64.src = "images/map/mm_20_shadow.png";

  but65 = new Image(12,20);
  but65.src = "images/map/mm_20_red.png";

  but66 = new Image(12,20);
  but66.src = "images/map/mm_20_blue.png";

  but67 = new Image(12,20);
  but67.src = "images/map/mm_20_green.png";

  but68 = new Image(12,20);
  but68.src = "images/map/mm_20_yellow.png";

  but69 = new Image(12,20);
  but69.src = "images/map/mm_20_white.png";

  but70 = new Image(12,20);
  but70.src = "images/map/mm_20_purple.png";

  but71 = new Image(12,20);
  but71.src = "images/map/mm_20_gray.png";

  but72 = new Image(12,20);
  but72.src = "images/map/mm_20_black.png";

  but73 = new Image(12,20);
  but73.src = "images/map/mm_20_orange.png";
}