<!--
var app = navigator.appName.toLowerCase();
var ver = navigator.appVersion.toLowerCase();
// get the first character from the string.
ver = parseInt(ver.substring(0,1));

var ie3 = (app.indexOf("microsoft") != -1 && ver >= 4);
var nn3 = (app.indexOf("netscape") != -1 && ver >= 3);
var isRollover = (ie3 || nn3);
	
// Browser detection for IE3.0 or Netscape 3.0 or above
if (isRollover) {	
	var baseurl = "./images/chi/main/";
	
	btnIntroOn = new Image;
	btnIntroOn.src = baseurl + "btnIntroO.gif";
	btnIntroOff = new Image;
	btnIntroOff.src = baseurl + "btnIntro.gif";
	
	btnSearchOn = new Image;
	btnSearchOn.src = baseurl + "btnSearchO.gif";
	btnSearchOff = new Image;
	btnSearchOff.src = baseurl + "btnSearch.gif";
	
	btnArticleOn = new Image;
	btnArticleOn.src = baseurl + "btnArticleO.gif";
	btnArticleOff = new Image;
	btnArticleOff.src = baseurl + "btnArticle.gif";
	
	btnBookOn = new Image;
	btnBookOn.src = baseurl + "btnBookO.gif";
	btnBookOff = new Image;
	btnBookOff.src = baseurl + "btnBook.gif";
	
	btnNewsOn = new Image;
	btnNewsOn.src = baseurl + "btnNewsO.gif";
	btnNewsOff = new Image;
	btnNewsOff.src = baseurl + "btnNews.gif";
	
	btnContactOn = new Image;
	btnContactOn.src = baseurl + "btnContactO.gif";
	btnContactOff = new Image;
	btnContactOff.src = baseurl + "btnContact.gif";

	btnEngOn = new Image;
	btnEngOn.src = baseurl + "btnEngO.gif";
	btnEngOff = new Image;
	btnEngOff.src = baseurl + "btnEng.gif";
}

function change(x,y) {
	if (isRollover) {
		document.images[x].src = eval(y+'.src');
	 }
}
//-->