var bModernAgent = ((navigator.appName == "Netscape" && navigator.appVersion.substring(0,1) >= "4") || (navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.substring(0,1) >= "4"));

if (bModernAgent) 
{
        img_temp0=new Image;
        img_temp0.src="images/homeb.gif";
        img_temp1=new Image;
        img_temp1.src="images/aboutb.gif";
        img_temp2=new Image;
        img_temp2.src="images/tariffb.gif";
        img_temp3=new Image;
        img_temp3.src="images/mapb.gif";
        img_temp4=new Image;
        img_temp4.src="images/linksb.gif";
        img_temp5=new Image;
        img_temp5.src="images/contactb.gif";
}

function funcSwapImage(imageName, bHilite) 
{
        if (bModernAgent) 
        {
                document.images[imageName].src="images/" + imageName + (bHilite == 1 ? "a.gif" : "b.gif");
		window.status="";
        }
        return false;
}