mac=(navigator.appVersion.indexOf("Mac")!= -1)?true:false;

ie=(navigator.appName.charAt(0) == "M")?true:false;

nn=(navigator.appName.charAt(0) == "N")?true:false;

 	if(mac){

 		if(ie){

 			fName = "font_mac_ie.css";

 		}

 		else if(nn){

 			fName = "font_mac_n.css";

 		}

 	}

 	else{

 		if(ie){

 			fName = "font_win_ie.css";

 		}

 		else if(nn){

 			fName = "font_win_n.css";

 		}

 	}

 	if(fName != null){

 		document.write('<LINK rel="STYLESHEET" href="../css/' + fName + '" type="text/css">');

 	}