//初期設定///////////////////////////////
	//画像保存先
	var path = new Array();
	path = location.pathname.split("/");
	var folder = "/"+path[1]+"/img/";

	//先読みする画像の名前
	var p_file = new Array('menu_home','menu_profile','menu_aboutus','copyright','b_contactus');

//main///////////////////////////////////
	var img = new Object();
	for (i=0;i<p_file.length;i++){
		img[p_file[i]] = new Image();
		img[p_file[i]+"_on"] = new Image();
		img[p_file[i]].src = folder + p_file[i] + ".gif";
		img[p_file[i]+"_on"].src = folder + p_file[i] + "_on.gif";
	}

	function On(name) {
		document.images[name].src = img[name+"_on"].src;
	}
	function Off(name) {
		document.images[name].src = img[name].src;
	}