mac=(navigator.appVersion.indexOf("Mac")!=-1)?true:false;
ie=(navigator.appName.charAt(0) == "M")?true:false;
ns=(navigator.appName.charAt(0) == "N")?true:false;
if(mac){
	if(ie){	//for mac IE
		CssFileName = "mac_ie.css";
	}else if(ns){	//for mac NS
		CssFileName = "mac_ns.css";
	}
}else{
	if(ie){	//for win IE
		CssFileName = "win_ie.css";
	}else if(ns){//for win NS
		CssFileName = "win_ns.css";
	}
}

if(CssFileName != null){
	window.document.write("<link rel=stylesheet href='../css/"+CssFileName+"' type='text/css'>");
}