var name = navigator.appName;
var vers = navigator.appVersion;
vers = vers.substring(0,1); // or 0,4  could return 4.5 instead of just 4

if (name == "Microsoft Internet Explorer") 	{document.write("");}
else if (name == "Opera")			{document.write("");}
else 	{document.write("<img src='/images/index/menu-first-ns.gif' border='0'>");}