var brow=navigator.appName;
if (brow=="Netscape")
	brow="NN";
else brow="IE";
var agent=navigator.userAgent;
if (agent.indexOf("Opera")!=-1)
	brow="Opera";
var ver=parseInt(navigator.appVersion);
if (brow=="IE")
	ver=parseInt(agent.substring(agent.indexOf("MSIE")+4, agent.indexOf("MSIE")+8));
if (brow=="Opera" || ver>4){
	document.writeln('<li'+'nk rel="stylesheet" type="text/css" media="screen" href="screen.css" />');
}