var browserVersion = parseInt(navigator.appVersion);

if ((browserVersion > 4)) { // For Mosilla and MSIE
	document.write('<style type="text/css">');
	document.write('	.radio {}');
	document.write('</style>');
} else { // For NN 4 and MSIE
	document.write('<style type="text/css">');
	document.write('	.radio {color: #ffffff; background-color: #ffffff;}');
	document.write('</style>');
}