var myplatform = navigator.platform;
var mybrowser = navigator.appName;	
	
//alert (myplatform);
	
if (myplatform == "Win32") {
   if (mybrowser.indexOf("Netscape") != -1){
	   mystyle = "<link rel='stylesheet' type='text/css' href='../css/netscape.css'>";
	   }
   else if (mybrowser.indexOf("Explorer") != -1){
	   mystyle = "<link rel='stylesheet' type='text/css' href='../css/explorer.css'>";
	   }
}
if (myplatform.indexOf("Mac") != -1) {
   if (mybrowser.indexOf("Netscape") != -1){
	   mystyle = "<link rel='stylesheet' type='text/css' href='../css/netscape_mac.css'>";
	   }
   else if (mybrowser.indexOf("Explorer") != -1){
	   mystyle = "<link rel='stylesheet' type='text/css' href='../css/explorer_mac.css'>";
	   }
}

document.writeln(mystyle);