pipesA_off = new Image();
pipesA_off.src = "images/ulva_pipes_02.jpg";
pipesA_on = new Image();
pipesA_on.src = "images/ulva_pipes_02_over.jpg";

pipesB_off = new Image();
pipesB_off.src = "images/ulva_pipes_03.jpg";
pipesB_on = new Image();
pipesB_on.src = "images/ulva_pipes_03_over.jpg";

pipesC_off = new Image();
pipesC_off.src = "images/ulva_pipes_04.jpg";
pipesC_on = new Image();
pipesC_on.src = "images/ulva_pipes_04_over.jpg";

pipesD_off = new Image();
pipesD_off.src = "images/ulva_pipes_05.jpg";
pipesD_on = new Image();
pipesD_on.src = "images/ulva_pipes_05_over.jpg";

pipesE_off = new Image();
pipesE_off.src = "images/ulva_pipes_07.jpg";
pipesE_on = new Image();
pipesE_on.src = "images/ulva_pipes_07_over.jpg";

pipesF_off = new Image();
pipesF_off.src = "images/ulva_pipes_09.jpg";
pipesF_on = new Image();
pipesF_on.src = "images/ulva_pipes_09_over.jpg";