if (document.images) {
  horizon_0 = new Image;
  horizon_1 = new Image;
  horizon_2 = new Image;
  horizon_3 = new Image;
  voyage_0 = new Image;
  voyage_1 = new Image;
  voyage_2 = new Image;
  voyage_3 = new Image;
  journey_0 = new Image;
  journey_1 = new Image;
  journey_2 = new Image;
  journey_3 = new Image;
  serenity_0 = new Image;
  serenity_1 = new Image;
  serenity_2 = new Image;
  serenity_3 = new Image;
  oasis_0 = new Image;
  oasis_1 = new Image;
  oasis_2 = new Image;
  oasis_3 = new Image;
          
  horizon_0.src = "what_graphics/room_horizon.gif";
  horizon_1.src = "what_graphics/room_horizon_1.gif";
  horizon_2.src = "what_graphics/room_horizon_2.gif";
  horizon_3.src = "what_graphics/room_horizon_3.gif";
  voyage_0.src = "what_graphics/room_voyage2.gif";
  voyage_1.src = "what_graphics/room_voyage2_1.gif";
  voyage_2.src = "what_graphics/room_voyage2_2.gif";
  voyage_3.src = "what_graphics/room_voyage2_3.gif";
  journey_0.src = "what_graphics/room_journey.gif";
  journey_1.src = "what_graphics/room_journey_1.gif";
  journey_2.src = "what_graphics/room_journey_2.gif";
  journey_3.src = "what_graphics/room_journey_3.gif";
  serenity_0.src = "what_graphics/room_serenity.gif";
  serenity_1.src = "what_graphics/room_serenity_1.gif";
  serenity_2.src = "what_graphics/room_serenity_2.gif";
  serenity_3.src = "what_graphics/room_serenity_3.gif";
  oasis_0.src = "what_graphics/room_oasis.gif";
  oasis_1.src = "what_graphics/room_oasis_1.gif";
  oasis_2.src = "what_graphics/room_oasis_2.gif";
  oasis_3.src = "what_graphics/room_oasis_3.gif";
}
        
else {
  horizon_0 = "";
  horizon_1 = "";
  horizon_2 = "";
  horizon_3 = "";
  voyage_0 = "";
  voyage_1 = "";
  voyage_2 = "";
  voyage_3 = "";
  journey_0 = "";
  journey_1 = "";
  journey_2 = "";
  journey_3 = "";
  serenity_0 = "";
  serenity_1 = "";
  serenity_2 = "";
  serenity_3 = "";
  oasis_0 = "";
  oasis_1 = "";
  oasis_2 = "";
  oasis_3 = "";
}