function h9page(){
	
	if(!document.getElementsByTagName) return false;
	if(!document.getElementById) return false;
	if(!document.getElementById("submenu")) return false;
	var nav = document.getElementById("submenu");
	var links = nav.getElementsByTagName("a");
	
		for(var i=0; i<links.length; i++){
			var linkurl = links[i].getAttribute("href");
			var currenturl = window.location.href;
			if(currenturl.indexOf(linkurl) != -1){
				var linkimages = links[i].getElementsByTagName("img")[0]
				var src_replace = linkimages.getAttribute("src").replace("_off.", "_on.");
				linkimages.setAttribute("src",src_replace);
			}
		}
		
		if(document.getElementsByTagName) {
		var images = document.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", h9page, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", h9page);
}