if (document.images) {

// 画像1
var img1on = new Image();
img1on.src = "/images/menubar/NewsOn.gif";
var img1off = new Image();
img1off.src = "/images/menubar/NewsOff.gif";

// 画像2
var img2on = new Image();
img2on.src = "/images/menubar/ServiceOn.gif";
var img2off = new Image();
img2off.src = "/images/menubar/ServiceOff.gif";

// 画像3
var img3on = new Image();
img3on.src = "/images/menubar/SystemOn.gif";
var img3off = new Image();
img3off.src = "/images/menubar/SystemOff.gif";

// 画像4
var img4on = new Image();
img4on.src = "/images/menubar/CompanyOn.gif";
var img4off = new Image();
img4off.src = "/images/menubar/CompanyOff.gif";

// 画像5
var img5on = new Image();
img5on.src = "/images/menubar/StockholderOn.gif";
var img5off = new Image();
img5off.src = "/images/menubar/StockholderOff.gif";

// 画像6
var img6on = new Image();
img6on.src = "/images/menubar/RecruitOn.gif";
var img6off = new Image();
img6off.src = "/images/menubar/RecruitOff.gif";

}

// ポイント時の処理
function On(name) {

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

}

// 放した時の処理
function Off(name) {

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

}