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/product/chinese/";		
		
		// navigation buttons begins 
		aboutOn = new Image;
		aboutOn.src = baseurl + "abouto.gif";
		aboutOff = new Image;
		aboutOff.src = baseurl + "about.gif";
		
		newsOn = new Image;
		newsOn.src = baseurl + "newso.gif";
		newsOff = new Image;
		newsOff.src = baseurl + "news.gif";
		
		localOn = new Image;
		localOn.src = baseurl + "localo.gif";
		localOff = new Image;
		localOff.src = baseurl + "local.gif";
				
		prodvOn = new Image;
		prodvOn.src = baseurl + "prodvo.gif";
		prodvOff = new Image;
		prodvOff.src = baseurl + "prodv.gif";
		
		typeOn = new Image;
		typeOn.src = baseurl + "typeo.gif";
		typeOff = new Image;
		typeOff.src = baseurl + "type.gif";
		
		contactOn = new Image;
		contactOn.src = baseurl + "contacto.gif";
		contactOff = new Image;
		contactOff.src = baseurl + "contact.gif";
		
		termsOn = new Image;
		termsOn.src = baseurl + "termso.gif";
		termsOff = new Image;
		termsOff.src = baseurl + "terms.gif";
		//navigation button ends
}