userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);

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



function findElement(n,ly) {
	if (browserVers < 4)		return document[n];
	var curDoc = ly ? ly.document : document;
	var elem = curDoc[n];
	if (!elem) {
		for (var i=0;i<curDoc.layers.length;i++) {
			elem = findElement(n,curDoc.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}



function changeImages() {
	if (document.images && (preloadFlag == true)) {
		var img;
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(changeImages.arguments[i],0);
			}
			else {
				img = document.images[changeImages.arguments[i]];
			}
			if (img) {
				img.src = changeImages.arguments[i+1];
			}
		}
	}
}
function drawLogo() {
	document.write("<div id=\"Table_01\">");
	document.write("	<div id=\"top\">");
	document.write("		<a href=\"http://yujitachikawa.jpn.org/\"");
	document.write("			onmouseover=\"changeImages('top015', '/images/top-over.jpg'); return true;\"");
	document.write("			onmouseout=\"changeImages('top015', '/images/top-15.jpg'); return true;\"");
	document.write("			onmousedown=\"changeImages('top015', '/images/top-over.jpg'); return true;\"");
	document.write("			onmouseup=\"changeImages('top015', '/images/top-over.jpg'); return true;\">");
	document.write("			<img src=\"/images/top.jpg\" width=\"240\" height=\"100\" border=\"0\" alt=\"Yuji Tachikawa&#39;s Web site\"></a>");
	document.write("	</div>");
	document.write("	<div id=\"button-home\">");
	document.write("		<a href=\"http://yujitachikawa.jpn.org/\"");
	document.write("			onmouseover=\"changeImages('button_home', '/images/button-home-over.gif'); return true;\"");
	document.write("			onmouseout=\"changeImages('button_home', '/images/button-home.gif'); return true;\"");
	document.write("			onmousedown=\"changeImages('button_home', '/images/button-home-over.gif'); return true;\"");
	document.write("			onmouseup=\"changeImages('button_home', '/images/button-home-over.gif'); return true;\">");
	document.write("			<img name=\"button_home\" src=\"/images/button-home.gif\" width=\"58\" height=\"15\" border=\"0\" alt=\"to Home\"></a>");
	document.write("	</div>");
	document.write("	<div id=\"button-news\">");
	document.write("		<a href=\"http://yujitachikawa.jpn.org/blog/\"");
	document.write("			onmouseover=\"changeImages('button_news', '/images/button-news-over.gif'); return true;\"");
	document.write("			onmouseout=\"changeImages('button_news', '/images/button-news.gif'); return true;\"");
	document.write("			onmousedown=\"changeImages('button_news', '/images/button-news-over.gif'); return true;\"");
	document.write("			onmouseup=\"changeImages('button_news', '/images/button-news-over.gif'); return true;\">");
	document.write("			<img name=\"button_news\" src=\"/images/button-news.gif\" width=\"58\" height=\"15\" border=\"0\" alt=\"to News\"></a>");
	document.write("	</div>");
	document.write("	<div id=\"button-bbs\">");
	document.write("		<a href=\"http://yujitachikawa.jpn.org/cgi-bin/bbs/minibbs.cgi\"");
	document.write("			onmouseover=\"changeImages('button_bbs', '/images/button-bbs-over.gif'); return true;\"");
	document.write("			onmouseout=\"changeImages('button_bbs', '/images/button-bbs.gif'); return true;\"");
	document.write("			onmousedown=\"changeImages('button_bbs', '/images/button-bbs-over.gif'); return true;\"");
	document.write("			onmouseup=\"changeImages('button_bbs', '/images/button-bbs-over.gif'); return true;\">");
	document.write("			<img name=\"button_bbs\" src=\"/images/button-bbs.gif\" width=\"59\" height=\"15\" border=\"0\" alt=\"to BBS\"></a>");
	document.write("	</div>");
	document.write("	<div id=\"button-photo-bbs\">");
	document.write("		<a href=\"http://yujitachikawa.jpn.org/cgi-bin/imgboard.cgi\"");
	document.write("			onmouseover=\"changeImages('button_photo_bbs', '/images/button-photo-bbs-over.gif'); return true;\"");
	document.write("			onmouseout=\"changeImages('button_photo_bbs', '/images/button-photo-bbs.gif'); return true;\"");
	document.write("			onmousedown=\"changeImages('button_photo_bbs', '/images/button-photo-bbs-over.gif'); return true;\"");
	document.write("			onmouseup=\"changeImages('button_photo_bbs', '/images/button-photo-bbs-over.gif'); return true;\">");
	document.write("			<img name=\"button_photo_bbs\" src=\"/images/button-photo-bbs.gif\" width=\"58\" height=\"15\" border=\"0\" alt=\"to Photo BBS\"></a>");
	document.write("	</div>");
	document.write("	<div id=\"button-gallery\">");
	document.write("		<a href=\"http://yujitachikawa.jpn.org/photos/\"");
	document.write("			onmouseover=\"changeImages('button_gallery', '/images/button-gallery-over.gif'); return true;\"");
	document.write("			onmouseout=\"changeImages('button_gallery', '/images/button-gallery.gif'); return true;\"");
	document.write("			onmousedown=\"changeImages('button_gallery', '/images/button-gallery-over.gif'); return true;\"");
	document.write("			onmouseup=\"changeImages('button_gallery', '/images/button-gallery-over.gif'); return true;\">");
	document.write("			<img name=\"button_gallery\" src=\"/images/button-gallery.gif\" width=\"58\" height=\"15\" border=\"0\" alt=\"to Gallery\"></a>");
        document.write("        </div>");
	document.write("	<div id=\"button-site-map\">");
	document.write("		<a href=\"http://yujitachikawa.jpn.org/sitemap.html\"");
	document.write("			onmouseover=\"changeImages('button_site_map', '/images/button-site-map-over.gif'); return true;\"");
	document.write("			onmouseout=\"changeImages('button_site_map', '/images/button-site-map.gif'); return true;\"");
	document.write("			onmousedown=\"changeImages('button_site_map', '/images/button-site-map-over.gif'); return true;\"");
	document.write("			onmouseup=\"changeImages('button_site_map', '/images/button-site-map-over.gif'); return true;\">");
	document.write("			<img name=\"button_site_map\" src=\"/images/button-site-map.gif\" width=\"58\" height=\"15\" border=\"0\" alt=\"to Site Map\"></a>");
	document.write("	</div>");
	document.write("	<div id=\"top014\">");
	document.write("		<a href=\"http://yujitachikawa.jpn.org/\"");
	document.write("			onmouseover=\"changeImages('top015', '/images/top-over.jpg'); return true;\"");
	document.write("			onmouseout=\"changeImages('top015', '/images/top-15.jpg'); return true;\"");
	document.write("			onmousedown=\"changeImages('top015', '/images/top-over.jpg'); return true;\"");
	document.write("			onmouseup=\"changeImages('top015', '/images/top-over.jpg'); return true;\">");
	document.write("			<img src=\"/images/top-14.jpg\" width=\"161\" height=\"100\" border=\"0\" alt=\"Yuji Tachikawa&#39;s Web site\"></a>");
	document.write("	</div>");
	document.write("	<div id=\"top015\">");
	document.write("		<a href=\"http://yujitachikawa.jpn.org/\"");
	document.write("			onmouseover=\"changeImages('top015', '/images/top-over.jpg'); return true;\"");
	document.write("			onmouseout=\"changeImages('top015', '/images/top-15.jpg'); return true;\"");
	document.write("			onmousedown=\"changeImages('top015', '/images/top-over.jpg'); return true;\"");
	document.write("			onmouseup=\"changeImages('top015', '/images/top-over.jpg'); return true;\">");
	document.write("			<img name=\"top015\" src=\"/images/top-15.jpg\" width=\"349\" height=\"85\" border=\"0\" alt=\"Yuji Tachikawa&#39;s Web site\"></a>");
	document.write("	</div>");
	document.write("</div>");
}

var preloadFlag = false;

function preloadImages() {
	if (document.images) {
		button_home_over = newImage("/images/button-home-over.gif");
		button_news_over = newImage("/images/button-news-over.gif");
		button_bbs_over = newImage("/images/button-bbs-over.gif");
		button_photo_bbs_over = newImage("/images/button-photo-bbs-over.gif");
		button_gallery_over = newImage("/images/button-gallery-over.gif");
		button_site_map_over = newImage("/images/button-site-map-over.gif");
		top_over = newImage("/images/top-over.jpg");
		preloadFlag = true;
	}
}