var normal  = new Array;
var w_glow    = new Array;
normal[0]   = new Image;
normal[1]   = new Image;
normal[2]   = new Image;
w_glow[0]   = new Image;
w_glow[1]   = new Image;
w_glow[2]   = new Image;
normal[0].src   = "/images/home_en_off.gif";
normal[1].src   = "/images/contact_en_off.gif";
normal[2].src   = "/images/japanese_home_off.gif";
w_glow[0].src   = "/images/home_en_on_mouse.gif";
w_glow[1].src   = "/images/contact_en_on_mouse.gif";
w_glow[2].src   = "/images/japanese_home_on_mouse.gif";

var buy_on  = new Image;
var buy_off = new Image;
buy_on.src  = "/images/buy_btn_on.gif";
buy_off.src = "/images/buy_btn.gif";

function glow(index) {
    document.images[index + 1].src = w_glow[index].src;
}
function end_glow(index) {
    document.images[index + 1].src = normal[index].src;
}