//RollOver
function smartOver() {
	smartRollover('gGoods'); //ロールオーバーを適用させたい箇所のIDを指定
	smartRollover('gPostage'); 
	smartRollover('gContact'); 
	smartRollover('gMaker'); 
}

function smartRollover(idName) {
	if(document.getElementsByTagName) {
		var images = document.getElementById(idName).getElementsByTagName("img");
		for(var i=0; i < images.length; i++) {

			if(images[i].getAttribute("src").match(/_off\./)){
				fileName = new Array(images[i].getAttribute("src").replace("_off.", "_on."));
				preImages = new Array();
				for (j=0; j<fileName.length; j++){
					preImages[j] = new Image();
					preImages[j].src = fileName[j]; //「_on」の画像をプリロード
				}

				images[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on.")); //マウスオーバーで_off→_on
				}
				images[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off.")); //マウスが離れたら_on→_off
				}
			}
		}
	}
}

if(window.addEventListener) {
	window.addEventListener("load", smartOver, false); //実行
}
else if(window.attachEvent) {
	window.attachEvent("onload", smartOver);
}
else{
	window.onload = smartOver;
}