var _agent = navigator.userAgent.toLowerCase();

var _win = (_agent.indexOf('win') != -1);
var _mac = (_agent.indexOf('mac') != -1);

var _brover = parseInt(navigator.appVersion);

var _ie = (_agent.indexOf('msie') != -1);
var _ns = ((_agent.indexOf('mozilla') != -1) && (_agent.indexOf('compatible') == -1));
var _nsup = (_ns && (_brover >= 5));
var _opera = (_agent.indexOf('opera') != -1);
var _safari = (_agent.indexOf('safari') != -1);
var _chrome = (_safari && (_agent.indexOf('chrome') != -1));
var _firefox = (_ns && (_agent.indexOf('firefox') != -1));

if(_chrome) {
  browser_id = "chrome";
}
else if(_safari) {
  browser_id = "safari";
}
else if(_opera) {
  browser_id = "opera";
}
else if(_firefox) {
  browser_id = "firefox";
}
else if(_nsup) {
  browser_id = "nsup";
}
else if(_ns) {
  browser_id = "ns";
}
else if(_ie) {
  browser_id = "ie";
}
else {
  browser_id = "other";
}


if(_win){
	switch(browser_id) {
		case "chrome":
			document.write('<link rel="stylesheet" href="/css/winopera.css" type="text/css">');
			break;
		case "safari":
			document.write('<link rel="stylesheet" href="/css/winopera.css" type="text/css">');
			break;
		case "opera":
			document.write('<link rel="stylesheet" href="/css/winopera.css" type="text/css">');
			break;
		case "firefox":
			document.write('<link rel="stylesheet" href="/css/winopera.css" type="text/css">');
			break;
		case "nsup":
			document.write('<link rel="stylesheet" href="/css/winie.css" type="text/css">');
			break;
		case "ns":
			document.write('<link rel="stylesheet" href="/css/winns.css" type="text/css">');
			break;
		case "ie":
			document.write('<link rel="stylesheet" href="/css/winie.css" type="text/css">');
			break;
		case "other":
			document.write('<link rel="stylesheet" href="/css/winns.css" type="text/css">');
			break;
	}
}
else if(_mac){
	switch(browser_id) {
		case "chrome":
			document.write('<link rel="stylesheet" href="/css/macopera.css" type="text/css">');
			break;
		case "safari":
			document.write('<link rel="stylesheet" href="/css/macopera.css" type="text/css">');
			break;
		case "opera":
			document.write('<link rel="stylesheet" href="/css/macopera.css" type="text/css">');
			break;
		case "firefox":
			document.write('<link rel="stylesheet" href="/css/macopera.css" type="text/css">');
			break;
		case "nsup":
			document.write('<link rel="stylesheet" href="/css/macie.css" type="text/css">');
			break;
		case "ns":
			document.write('<link rel="stylesheet" href="/css/macns.css" type="text/css">');
			break;
		case "ie":
			document.write('<link rel="stylesheet" href="/css/macie.css" type="text/css">');
			break;
		case "other":
			document.write('<link rel="stylesheet" href="/css/macns.css" type="text/css">');
			break;
	}
}