bn = navigator.appName;
if(bn.substring(0,9) == "Microsoft") {
	document.write('<link rel="stylesheet" type="text/css" href="styles.css">');
} else {
	document.write('<link rel="stylesheet" type="text/css" href="styles_nn.css">');
}

function changeImages() {
	if (document.images) {
			document[changeImages.arguments[0]].src = changeImages.arguments[1];
	}
}