var brAgent = navigator.userAgent;
var Macos = (brAgent.indexOf('Mac')!=-1);
var Winos = (brAgent.indexOf('Win')!=-1);
var IE5 = (brAgent.indexOf('MSIE')!=-1);
var NS6 = (brAgent.indexOf('Gecko')!=-1);

if(Macos){
	if(IE5){
		document.write ('<link rel="stylesheet" href="./css/mac-os.js" type="text/css">')
	}else if(NS6){
		document.write ('<link rel="stylesheet" href="./css/mac-ns.css" type="text/css">')
	}else{
		document.write ('<link rel="stylesheet" href="./css/other.css" type="text/css">')
	}
}else{
	if(IE5){
		document.write ('<link rel="stylesheet" href="./css/win-ie.css" type="text/css">')
	}else if(NS6){
		document.write ('<link rel="stylesheet" href="./css/win-ns.css" type="text/css">')
	}else{
		document.write ('<link rel="stylesheet" href="./css/other.css" type="text/css">')
	}
}