bu04_01_on = new Image();
bu04_01_on.src = "../../image/submenu/bu04_01_on.gif";
bu04_01_off= new Image();
bu04_01_off.src= "../../image/submenu/bu04_01_off.gif";

bu04_02_on = new Image();
bu04_02_on.src = "../../image/submenu/bu04_02_on.gif";
bu04_02_off= new Image();
bu04_02_off.src= "../../image/submenu/bu04_02_off.gif";

bu04_03_on = new Image();
bu04_03_on.src = "../../image/submenu/bu04_03_on.gif";
bu04_03_off= new Image();
bu04_03_off.src= "../../image/submenu/bu04_03_off.gif";