// 画像on,off切り替え

function smartRollover() {
	if(document.getElementsByTagName) {
		var images = document.getElementsByTagName("img");

		for(var i=0; i < images.length; i++) {
			if(images[i].getAttribute("src").match("_off."))
			{
				images[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
				}
				images[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
				}
			}
		}
	}
}

if(window.addEventListener) {
	window.addEventListener("load", smartRollover, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", smartRollover);
}


// ナビon,off切り替え

var preloadFlag = false;

function newImage(arg) {
if (document.images) {
rslt = new Image();
rslt.src = arg;
return rslt;
}
}

function changeImages() {
if (document.images && (preloadFlag == true)) {
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src =
changeImages.arguments[i+1];
}
}
}

function preloadImages() {
if (document.images) {

// 先読みする画像
menu_01_over = newImage("/navi_01_on.jpg");
menu_02_over = newImage("/navi_02_on.jpg");
menu_03_over = newImage("/navi_03_on.jpg");
menu_04_over = newImage("/navi_04_on.jpg");
menu_05_over = newImage("/navi_05_on.jpg");
menu_06_over = newImage("/navi_06_on.jpg");
menu_07_over = newImage("/navi_07_on.jpg");
menu_08_over = newImage("/navi_08_on.jpg");
menu_09_over = newImage("/navi_09_on.jpg");
preloadFlag = true;
}
}