window.onerror = null;
browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

if (browserVer >= 3)
{
homeOn = new Image();
homeOn.src = "images/btn_home_on.jpg";
aboutOn = new Image();
aboutOn.src = "images/btn_about_on.jpg";
servicesOn = new Image();
servicesOn.src = "images/btn_services_on.jpg";
contactOn = new Image();
contactOn.src = "images/btn_contact_on.jpg";

homeOff = new Image();
homeOff.src = "images/btn_home.jpg";
aboutOff = new Image();
aboutOff.src = "images/btn_about.jpg";
servicesOff = new Image();
servicesOff.src = "images/btn_services.jpg";
contactOff = new Image();
contactOff.src = "images/btn_contact.jpg";
}

function imgOn( name )
{
	if( browserVer >= 3 )
		document[name].src = eval ( name + "On.src");
}

function imgOff( name )
{
	if( browserVer >= 3 )
		document[name].src = eval ( name + "Off.src");
}