if (document.images) { 

 var img1on = new Image();
img1on.src = "img/dvd_hh2.jpg";
 var img1off = new Image();
img1off.src = "img/dvd_hh.jpg";

 var img2on = new Image();
img2on.src = "img/dvd_3p2.jpg";
 var img2off = new Image();
img2off.src = "img/dvd_3p.gif";

 var img3on = new Image();
img3on.src = "img/dvd_black2.gif";
 var img3off = new Image();
img3off.src = "img/dvd_black.gif";

 var img4on = new Image();
img4on.src = "img/dvd_colt2.jpg";
 var img4off = new Image();
img4off.src = "img/dvd_colt.jpg";

 var img5on = new Image();
img5on.src = "img/dvd_apollo2.jpg";
 var img5off = new Image();
img5off.src = "img/dvd_apollo.jpg";

 var img6on = new Image();
img6on.src = "img/dvd_jelly2.jpg";
 var img6off = new Image();
img6off.src = "img/dvd_jelly.jpg";

 var img7on = new Image();
img7on.src = "img/dvd_soldiers2.jpg";
 var img7off = new Image();
img7off.src = "img/dvd_soldiers.jpg";

 var img8on = new Image();
img8on.src = "img/dvd_tobikiri2.jpg";
 var img8off = new Image();
img8off.src = "img/dvd_tobikiri.jpg";

 var img9on = new Image();
img9on.src = "img/dvd_anoyo2.jpg";
 var img9off = new Image();
img9off.src = "img/dvd_anoyo.jpg";
}

 function On(name) { 

 if (document.images) { 
 document.images[name].src = eval(name + 'on.src'); 
 } 
 }
 function Off(name) { 

 if (document.images) { 
 document.images[name].src = eval(name + 'off.src'); 
 } 
 }