img1on =new Image();
img1on.src ="img/home_on.jpg";
img2on=new Image();
img2on.src="img/map_on.jpg";
img3on=new Image();
img3on.src="img/menu_on.jpg";
img4on=new Image();
img4on.src="img/english_on.gif";
img5on=new Image();
img5on.src="img/home_en_on.jpg";
img6on=new Image();
img6on.src="img/map_en_on.jpg";
img7on=new Image();
img7on.src="img/menu_en_on.jpg";
img8on=new Image();
img8on.src="img/japanese_on.gif";

img1off=new Image();
img1off.src ="img/home_off.jpg";
img2off=new Image();
img2off.src="img/map_off.jpg";
img3off=new Image();
img3off.src="img/menu_off.jpg";
img4off=new Image();
img4off.src="img/english_off.gif";
img5off=new Image();
img5off.src="img/home_en_off.jpg";
img6off=new Image();
img6off.src="img/map_en_off.jpg";
img7off=new Image();
img7off.src="img/menu_en_off.jpg";
img8off=new Image();
img8off.src="img/japanese_off.gif";



// IMAGE ON FUNCTION

function imgOn(imgName)
   {
      document[imgName].src = eval(imgName + "on.src");
   }


// IMAGE OFF FUNCTION

function imgOff(imgName)
   {
      document[imgName].src = eval(imgName + "off.src");
   }