if (document.images)
{ 
img1on = new Image ;img1off = new Image; 
img2on = new Image ;img2off = new Image; 
img3on = new Image ;img3off = new Image;
img4on = new Image ;img4off = new Image;
img5on = new Image ;img5off = new Image;
img6on = new Image ;img6off = new Image;

img1on.src = "img/index_kn_06_2.jpg";img1off.src = "img/index_kn_01_1.jpg";
img2on.src = "img/index_kn_01_2.jpg";img2off.src = "img/index_kn_01_1.jpg";
img3on.src = "img/index_kn_01_2.jpg";img3off.src = "img/index_kn_01_1.jpg";
img4on.src = "img/index_kn_02_2.jpg";img4off.src = "img/index_kn_02_1.jpg";
img5on.src = "img/index_kn_01_2.jpg";img5off.src = "img/index_kn_01_1.jpg";
img6on.src = "img/index_kn_05_2.jpg";img6off.src = "img/index_kn_05_1.jpg";
}

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

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